1967 Chev 302 parts choice question

[Joe Abbazia]

Rory do what real engine builders do when building a stocker motor.Get your self a large journal crank and have it cut down to small journal.

[Tom Moock]

Jeff Lee, crank spacers are legal with bowtie and dart block, Alan Roehrich they don't make bowtie or dart small journal blocks, look up rod specs on approved parts. Tom

[Alan Roehrich]

Tom, they have made small journal Bow Tie blocks, I've worked on several. They go in an out of production, and are hard to find. The first 4 digits of the part number are, or were, 1248, they share the same casting box as the 1248050 medium deck block (3.98 rough bore, 283 main journal, casting #12480050) and the 12480097 SB 2.2 block (4.116 rough bore, 283 mains, SB 2.2 lifter pattern, casting # 10051184A). They made a 3.98 bore block with 283 journals, standard lifter pattern, and a 9.025 deck height. If/when they'll make any again is a hard question to answer. If memory serves correct, the casting number was 10051184, I think one part number was 12480084. It was originally made for the 18 degree NASCAR program.

They don't make a Dart small journal. They probably won't, but you can always ask. What they won't do is make a Dart block that is 3.875 or smaller bore. The SHP blocks are 350 main, it might be possible for them to make a small journal version, but they'd probably want to make 50.

[Rory Christianson]

So crank spacers are legal with Bowtie block but not with the larger journal gm block ?

I was thinking at one time of using a 70 era block and a 283 crank , but then thought I could not use a bearing spacer ?


Also do they make a gm performance replacement manifold that is legal ? Or only the gm stock original manifold

[Dwight Southerland]

Large journal blocks with spacer bearings are accepted. Depending on how serious an effort you want to do, the Bowtie block is a much better investment for the long run than a production block. Shoot me a PM and I will send you my email address if you want to bypass the forum. Also, it will also help you to contact John Duzac and the Wenzel Bros. They are great guys to talk to and will be willing to share info and experience.

[Tom keedle]

correct me if i'm wrong but, wern't the small journal Z-28's all 2 bolt mains?


where does that leave the aftermarket blocks?


and who was it crying about the amc guys getting a break on an intake and carb?.........

[Alan Roehrich]

Originally Posted by Rory Christianson

So crank spacers are legal with Bowtie block but not with the larger journal gm block ?

I was thinking at one time of using a 70 era block and a 283 crank , but then thought I could not use a bearing spacer ?


Also do they make a gm performance replacement manifold that is legal ? Or only the gm stock original manifold

Rory, to the best of my knowledge, there is no legal replacement manifold. I sold the last one I had back in February. They usually bring around $400 to $500. The guy who bought mine is building a stocker.

You can use the spacers in a production block, a Dart block, or a BowTie block. I would not use a production block, as Dwight said, you're money ahead using the better blocks. They last longer, stay fresh longer, and make more power. You spend a lot of money on the blueprinting operations on a production block that are not needed on a race block.

[Rory Christianson]

Thanks again for all the info
I agree the Bowtie or aftermarket block sounds like a better choice for sure, and I wasn't sure on the bearing spacers if they were allowed or not
I did see some manifolds for sale on eBay

Does anybody know the number on the quick fuel carb that is allowed ?

Thanks

[Alan Roehrich]

Rory, it's the SSR-780-VS. Call Phil Vickus at Quick Fuel, 270-793-0900, or call Jimmy Bridges, 615-228-3516. Jimmy is a good option on heads and intakes as well.

[Rory Christianson]

Thanks !!