Need 250 I6 info:

[T2vigil]

Why are the cast iron headers for a 250 so hard to find? Where could I find them? You see them for the 235 / 216 all the time. Also I am looking for finned aluminum valve cover and side covers and want to know the best place to get them. Thanks for any info.

[Heater63]

not hard at all. Tom Langdons the guy, @ www.stoveboltengineco.com
I have his cast headers, and they are very very nice.
I have his side covers and they are very very very nice.
I have his custom "small" HEI, which is the only HEI that will fit easily under an AC compressor.

those cast headers on the 235 are called Fentons.

[T2vigil]

Thanks a bunch. I was hung up on Fenton for my searches.

[TJ's Chevy]

Clifford also makes headers.

[1963c-10]

Remember that a lot of 230, 250 & 292 parts are interchangeable....some are not. Exhaust is one that will

[Old Bleu]

You might also want to check out Tom Lowe's site, 12bolt.com

[TJ's Chevy]

Non-inter-changable would be sidecovers,clutch,cam(unless you change to electric fuel pump),pushrods,damper, and maybe some other things, but thing like valve cover,intake/exhaust stock or aftermarket,distributor,fuel pump, water pump, head, and pistons I believe are inter-changable.

[tincan1966]

292 pistons do not interchange with the 230/250 due to the different compression height and pin location. ,

[T2vigil]

The 305 V8 pistons work on the 250/230 and they are flat top and not the dish type from the factory.

[TJ's Chevy]

Originally Posted by tincan1966

292 pistons do not interchange with the 230/250 due to the different compression height and pin location. ,

Your right, pardon my mess up. I know flat top pistons aren't inter-changeable
also cause the compression distance. Piston wise I meant bore size was the same between the 230-250-292.

[Dillon Rock]

Also, the heads on 292's aren't interchangeable on the smaller blocks due to a higher deck on the big ol' 292's.

[66Submarine]

Originally Posted by Dillon Rock

Also, the heads on 292's aren't interchangeable on the smaller blocks due to a higher deck on the big ol' 292's.

No, the heads are the same. 292's came with rotators on the exhaust valves, but the head was otherwise the same. (Some will put 194 heads on 292's for extra compression.)

[TJ's Chevy]

They actually are because I have seen a 194 head on a 292.

[TJ's Chevy]

292 has 3.875 bore and 4.120 stoke, 250 has 3.875 bore and 3.530 stroke, and the 230 has a 3.875 bore and a 3.250 stoke. Basically the 250 is a stroked 230, and the 292 would be a majorly stroked out 230 if they were the same block. The Gmc 302 has a 4 in bore and 4 in stroke, and 7 inch connecting rods! Making it the tallest deck 6 cylinder on the gm line!