Yes it is! Thanks for hanging with me on that and helping me see my error.

I'll be reaching out to a couple different places for a quote on boring the jug.

Is there a noticeable performance gain on these engines by going with a larger bore? I like the idea of making it a 383cc motor (It'll match my other project - a Road Runner with a 383 in it.), but that means jumping up to a 83.5mm bore, bypassing the 83.25 option. Thoughts?

 

Nope not really.. Over size only what's needed to clean and straighten the bore.Save the cylinder for future bores.