Auto Racing: engine building, performance machine shop, chevy 305

Question
Is it safe to bore a late model 5.0 block to .0060 over,street use only.

Answer
It depends entirely on the type of block and who made it. If it's a Chevy 305, well no !   If it's a Ford, I'm not sure. You're going to have to take it to a machine shop anyhow, ask the machinest what he thinks about that particular engine.  Hopefully you will take it to a performance machine shop, and they'll know . Most race engines are bored .030" and if moroe is needed, they use a different crank and rods and "stoke " the motor.

You can also have the block tested sonically.  That tells the story but is kinda pricey. Not, however, as pricey as boring one out and then learning that you have no cylinder wall left.

More modern domestic V-8's are built as much for lightness as durability these days, and the whole engine is much thinner than say, an older 350 SBC.

Since I havent' worked on any V-8's in many years, you should seek the advice of others more familiar with the modern ones.

Good luck

Dan Liddy
Sarasota, Florida