Cylinder wall thickness of 400 blocks

[TexasRoadRunner68]

My old 400 block needed 0.060 over to clean up the bore. I bought another that cleaned up at less to match my rotating assembly. I have no use for a stock displacement 400, so my only reason to keep it around would be a spare for another stroker build. However most places don’t seem to sell kits for 0.060. Are the cylinder walls probably thick enough to justify keeping it as a spare, or would you guys say it’s not really usable for a higher power build when it’s bored that big?

I know sonic testing is the only way to be sure.

 

[Beekeeper]

Keep it will do fine at .060 over I still say get it sonic tested If you were closer I would either take it off yours hands or even test it for you.

 

[qkcuda]

I bored my last one .040, which worked out the same as a .060 over 440, without any issues. I am interested in other people's experience as I may be doing another 400 in the near future.

 

[pnora]

Sonic test always should be done. One will never know. As far as .060 over 440 source has them. Indy has them. Where are you looking?