Bore sizes

[80malibucoup]

I need the stock bore sizes for a 400 sbc,350 sbc,and 305 sbc. I'm getting all three motors and the guy tells me there virgin blocks,never been cut or raced.

 

[468malibu]

4.125 for the 400, 4" for the 350, and dunno on the 305, under the 4" cause a 305 and 350 have the same stroke. If I wasn't being lazy I could run the math....

 

[80malibucoup]

Ok,if I go 40 over on the 400 that would be a 4.165 bore right? And 60 over would be 4.185?

 

[t5montecarlo]

yes.

 

[80malibucoup]

Ok thank you,I just needed to reasure my math was right. I want to do a 427sbc,I wanted to start with a fresh block not one that was cut already.

 

[SSedan64]

305 = 3.736"
If you're gonna bore the 400 more than .030" Sonic check the Bores.

 

[80malibucoup]

305 = 3.736"
If you're gonna bore the 400 more than .030" Sonic check the Bores.

That was the plan. Thanks,I'm glad there are people that don't mind giving their insite on thing on here,it helps a lot. dancin_banana.gif