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I have seen examples where the Mexican block main cap fasteners failed - this was a normally aspirated "built" engine it used ARP studs instead of bolts - they believed it had to do with the quality of the iron used in the block casting the threads in #2, #3 and #4 literally disintegrated

Ford is famous for this stuff only to be outdone by chrysler. One of the reasons chevrolet has been so successful keep it simple.

Did u say that’s a original hemi convertible? Man if so that’s got to be close to a million dollar car now days.

Has too much power, so they put open headers on it.

OE Boss block was a stronger iron and 85-98 302's had different firing order with different lifter bore diameter I believe. The change in firing was to relieve strain on #1 main I think. Not sure of the price point of a new SVO Boss block or if it's a direct replacement.

The weirdest one i seen was in a 79 Lincoln Versailles that had a crank sensor in the rear.

Ford Valves - two piece. Known for breaking in Boss 302 motors. Typically its the intake that breaks the head off instead of the exhaust like yours. Replace all valves with once piece high quality valves like Manley or Ferrea.

Wowthats dark looking oil. Yikes!

Love it my 70 442 is almost done and will be on the streets hopefully by next month

I have an Australian Falcon 1997 ute with the 302 in it. I was hoping maybe someone is their sufficient material to modify a two bolt block to suit the four bolt main cap ? What other differences are there between has the Boss block over the two bolt standard block without the obvious cam and head differences

Thanks for making a comparo of 4 blocks in 4 min and not 30...or an hour Sucks so many gotta nit pick your vid instead of thanking you for what info you put up. Glass half full!

iv seen a lot of vids and out of all of them this is the best one i seen on how to set your adj vacuume canister very well explained

Thank you for this wonderful informative video,💯👍🏻😃

Best motor ever

Great video thanks.👍

Great Info!!! Thank you!!!!!

289 special galaxy?, 289 Hipo? K code, 289 Challenger D code? Missed a few we did!

...is the cobra version of the 302 block any different in terms of construction than the GT 5.0 version? Just curious

Looks like the front of the roller block is thicker. The block doesn't have a visible bulge from the oil galleys and main bolt thread castings like the older block to its right. I wonder if some measurements actually support this observation. Would be cool to measure and compare the thicknesses of the main webbing between these too.

Screw in freeze plugs on the Boss?? One piece rear main seal on “ newer” 302’s??? You did not cover those items.

Regarding the serial number on the lower block above the oil pan...those are only found on California Hipo Mustangs...if your car was manufactured in Detroit the engines are not serialized to a particular car (a guy who owned two Hipo 289's, denoted by the bigger main caps, and neither block had the serial/vin number on the block). Fyi, as to Shelby's claimed 306 BHP...that is spot on. One of my Hipo engines i applied the Shelby mods and it pulled 305 on the dyno.

Does this block VIN match your Shelby? Is there a VIN showing? You probably know why I'm asking :)

Sadly the one thing they all have in common, they still split in the cam valley.

Is the 1996 f150 5.0 block any good for rebuilding alittle hotter? Ive got a complete engine...

These days the choices are really between the non-roller block, the roller block, and aftermarket performance blocks.

Thanks for the good view of a 302 boss anyway and good luck .

I but a set off heads my self just like this one's for 100 dollars with comp cam roller rockers dual springs got them installed on my 302 .bore 30 over sounds pretty damn good I didn't even finish elementary but when u want to learn u learn

I but a set off heads my self just like this one's for 100 dollars with comp cam roller rockers dual springs got them installed on my 302 .bore 30 over sounds pretty damn good I didn't even finish elementary but when u want to learn u learn

Does anybody know what car or engine that a Ford C90Z6250C camshaft came in?

Did Edlebrock ever build & sell crate 289s or 302s?

i just look for the thicker balancer .

This is a very interesting video on the 302 small block engine. But I still can't find info about why my 302 engine oil filter is way bigger then my sister engines oil filter. Mines a 89 and hers is a 92. If anyone knows more about this please let me know.

The roller blocks are weak making any real hp and really do better with a girdle. Do love the Windsors though. They're a mighty mouse. 331ci is an amazing setup. I recall a few guys here making up to 700hp with production 351w blocks no prob.

I’ll take the one on the engine stand, thank you very much!!😉🤣🤣🤣 I put together a 289 (+.030”) for my ‘65 Galaxy. It had 2-bolt mains and a cast crank. I had it very nicely balanced, and used Moroso main studs. Also ran a solid lifter cam and roller rockers. Had a built C4 trans with a 3000 RPM converter feeding a 9” rear with 4.11 Richmond gears (eventually swapped them out for 3.73s). That thing would turn 7,000 RPM no sweat. Never got the opportunity to race it, but it sure did surprise a lot of people!!😉🤣🤣 Wish I still had it!🤷‍♂️

I find Mexican 302 engine blocks mainly in pickup trucks and they don't seem hard to find if you search 302 pickups for them. The cylinders in them don't seem to wear as well, like due to the iron used. Some people claim they are "stronger" because they heavier and thicker.

U forgot the No1 point . Vacuum advance occurs at light throttle steady state cruise ie between 27mph ---- 55mph . U set the xtra advance between these vacuum /road speed points . If u still have a very basic distributor u may need xtra advance pending your setup so either manifold or ported setup might be better for you . When u have standalone programmable timing idle timing and cruise advance can be what ever u want

I have a 1986 302. It's the only one Carol shelby said was worth building. Extra webing.

That cam sounds really mild. Not the factory Boss cam. Is it?

Mine had very tall valve covers in a 67 mustang

LOL... Posted some of your BOSS 302 vids. on Tumblr...

Luv 289 HIPO's, cool engine... Always wanted one... I had 289's... If you ask me the 289 was Ford's BEST small block...

WILD... Luv that sound and smell of race gas, lol... I forget now is that a 735cfm or 780cfm carb. . Bruce Bean a good friend raced with Brad Winters and both became friends with Ralph Moody... Bruce did some restoration work on Ralph's Thunderbolt... Keep up the good work, ciao...

LOL... My 302 block has 4 bolt mains, screw in freeze out plugs... Ooooh it has a C8 casting number... Crank wise BOSS 302's had 2 steel steel cranks a cross drilled in '69 and a solid steel crank in '70... '69 heads had 2.23 intakes '70 heads had 2.19 intakes... I have the Trans Am block, '70 heads, '69 crank... BOSS 302's used 289 HIPO rods with a special piston from TRW...

That valve shows textbook Cleveland 2 piece valve failure. Not common but becomes so on high valve spring tension, high revving engines. All hipo Clevelands should always be fitted with one piece valves. The valve stem is supposedly too small for the large valve sizes coupled with heavy springs and high revs. They break where the stem is fused to the head, exactly where yours has broken. They do this because the stem is liquid filled for cooling I believe - it is hollow. They fuse this stem to the head. Ford were cutting loose when they designed the Cleveland heads and I believe they have used every known technical feature. Cooled stems ✅ Big valves✅ Smallish stems - theoretically good due to lower friction, but they just pushed it a bit too far, I reckon. They are otherwise fantastic heads and any hot rodder would normally replace valves anyway.

Smal Block Chevy, ok. 289 ford, loved them durable, high winding with a good intake and carb, solid lifter cam. Heaven.

Smallblock

Great job on describing the differences on the 302 blocks. I had a 289 C code in my first 1965 Mustang Fastback, I blew out the press in oil galley plug behind the timing chain gear revving it to 6,000 rpm, and ruined the engine using a high pressure Mellings Oil Pump. When I later built a 302 Mexican Block, I tapped out the oil galleys for screw in plugs. If I recall, Shelby used a 302 Mexican block in the 1968 GT-350's.

I bought a 93 cobra 5.0 block that was notched for a stroker and with an engine girdle, man that boss is hands down beefier

Hey 302, whatcha wearing tonight. bow chucka bow bow!

Music to our ears 👍