1973 340 budget build.

trigger_andy said
I need to learn how to multi-quote.

To multi quote, I highlight the quote tag at the end of the quoted message and copy it. Notice that the bottom quote tag has an additional character in it. “/“ Remove that “/“ to begin the quote, leave it in to end the quote.

Ok, so CR will be a thing I'll not know for quite a while then.

Once you know where the piston sits in the bore, add the head gasket thickness, cylinder head cc ....

I thought Id port before the Valve before the seat grinding incase I knick the fresh seats? Is that a bad idea?

Yes, it’s backwards. Seats and valves installed first. Then remove and port. I forget the percentage of bowl opening you want. It is a percentage of the valve size.