Thread: bore on small block chevy

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i measured my cylinders on my 350 with a dial caliper to see if it had been bored and it measured 4.070 is that 70 over bored or what my father told me u can only bore 60 over unless u sleeve the cylinder walls

See if you can borrow a dial bore gauge.

did it come with any pistons? or was this just a bare block?

that would be .070 over if the block is old enough you may get away with it. I've had to sleeve them at .060. I would have it checked before buying pistons and rings you could be wasteing your $$.

zollner made cast pistons to 080 not sure if i would bore just any 350 out that far have to look it over good ... really i never bored one past 060 more then that for a sleeve ... that alot for a thin block to start with .but if it.s the only block ? better blocks around here are EZ to find so it.s your call

I question the measurement he took.

yes it came with pistons flat top

Originally Posted by leatherlung51

yes it came with pistons flat top

look at the piston they should be stamp over size on the top 020. 030.040.060.080 like that

yeah Pat's right, it's why i was curious if it came with any pistons. typically they'll be stamped right on top of the piston although i have seen a few cast on the inside opposite of the inside marker cast. here's a pic (not the best) but just an example.

piston.jpg