What differences in 351 with 9.48 vs 9.503 deck height?

[Rookie71]

What things will need to be address when buying parts to have a 408 stroker put together when using a '69 9.48 deck height block? Does this impact the intake manifold. I assume a stroker kit needs to be different to accomodate the shorter height? Right wrong? other things?

Thanks.

 

[FullAuto]

You basically just need to brand shop and compare overall compression heights. Some kits will vary a few thousandths. You might just end up with a kit that is .02 out of the hole. Check with your machinist to see what will be an acceptable range.

But for example, I know the short rod 347 kits are becoming popular because of the internet myth that the long rod version burns oil. You can thank the guys that can't properly assemble a shortblock for that. So CHP offers a 5.315" rod version of the 347. Scat's version uses a 5.325" rod. They use the same piston. The CHP version comes out to 8.190" deck height. The Scat version comes out to 8.200" deck height.

I don't think you're going to be able to find a specific kit for a .002 shorter deck though. If you really wanted to spend some cash, you could always get a custom piston.

 

[86nu]

I thought the two deck heights were 9.2 and 9.5

 

[FullAuto]

I thought the two deck heights were 9.2 and 9.5

9.2" is a Cleveland. 9.5" is a Windsor. In reality, the '69-'70 351W was 9.48" deck height. The '71-up was a 9.503". Just like our 8.2" deck 5.0s are 8.203".