302 F-F-Ford Blocks

[Mark Yacavone]

Which ones are best?
What overbore size is safe, absent a sonic tester?
What thickness would you like to see, with a tester?
(for a Stocker)
Early?
Middle years?
Roller blocks?
Asking for a friend , who knows as little as I do on the subject. ;-)

[BRETV]

Roller blocks are junk. We used older 302 blocks and set them up for the roller lifters and Hard Bloked them. My last Super Stock motor we used a new Boss block. Biggest we've gone is .060. I've never seen any testing #'s. Would sure have liked to though. 28 oz stuff is faster than the 50 oz newer stuff.




Bret Velde
2003 I/SA

[Glenn Briglio]

Dart SHP or Boss block. Boss block cylinders are shorter than Dart.

[Kirk Morgan]

The blocks made in Mexico are slightly better the the roller blocks and about the same as the pre-roller blocks.

[Mark Yacavone]

Originally Posted by Kirk Morgan

The blocks made in Mexico are slightly better the the roller blocks and about the same as the pre-roller blocks.

Okay, thanks
I just spent a half hour reading about Mexican blocks.
Some claim they are 10 pounds heavier, because of the beefier mains.
Everyone seems to want them for strokers.
Nobody, and I mean nobody even mentions the wall thickness.
Not really surprised.
Anyone ever sonic a Hecho in Mexico block?

[Joe Strunk]

We used the Mexican Blocks with Block fill .060 over is about max

Early blocks prepped this way are good to +/- 500 HP

The beefy aftermarket stuff is way to heavy and is overkill for the HP

A4 about the Best but hard to come by

The Later Ford BOSS blocks are good for the weight but $$

I have a standard bore BOSS service block I may be willing to let go

Good Luck!

[Ralph A Powell]

On the original Ford Boss 302 blocks are all real good EXCEPT THE D0ZE-A it is not a Square Bore casting don?t try to over bore the 4.00 inch! Others will take a 4.060 bore!

[1347]

The early 302 blocks like 1968 are better sonic wise than the later blocks. Don't believe anything about the Mexican blocks other than. They have the hipo main caps. You can also just buy the steel main caps and install them. Definitely fill the block. Also neutral balance saves the block. Rule of thumb is 500hp and 8000 rpm is the limit on a std 2 bolt block. For the price of an original Boss 302 block you can buy a Dart

[Ralph A Powell]

Is the Dart legal! If so that?s what I would use!

[StockerStang912]

Dart is legal, but if it's a Stocker I don't think an aftermarket block is worth the $$, work/effort to get accessories and headers to fit or the extra +30lbs. You'll be well under the 500hp and 8K RPM range which the early blocks are plenty good for.