[ct clint]

Ok if no one else is going to say it i will. That needs to come out b hot tanked and flushed out. Check bores for true Ness if good deglazed. I like to deck them also. Crank needs to be inspected good time to polish it if it's in speck. Spend the money get rotating assamably balanced. If u are using new heads they should be pulled apart cleaned and inspected. U will be surprised what u find they are mass produced not built buy loving hands. You can fit your parts together right and did your math it should be good. In the best motors round things are perfect round and flat is flat. Do some math on how much air will flow through the headers. Yours may be fine u only need to push out what goes through the carb. Sorry for the rant but don't waste money do it right. There are far smarter guys on here then me I am sure they will add.