273 302 318 340 build

Stopped by machinist today, to drop crank off for a polish. He said to go with X. Let it breathe. I mentioned tearing them down and a diy port job. He said absolutely. But to leave exhaust ports alone besides the casting flash. So I'll try to make garage time on the heads thru the winter.
Thanks for encouragement.
Oh gotta check for pilot bearing, ill get that drilled while its at shop if it hasnt already.
MOPEkidD-3 said
I'd use the X heads, 302s might be good on a 340 if you port the sh** out of them and put in bigger valves lol. 273 adjustable rockers too, sounds like a nice traditional build with all the factory "good stuff"... really looking forward to how this turns out, best of luck! Should be a lot of fun and pretty bulletproof with all the factory parts.

EDIT: BTW I have a 1970 FSM I could copy the pages with the specs you need and send it to you? Let me know which ones you need...
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