273 302 318 340 build

Got 1st head stripped. From a visual with magnifying glass looks good.
Valves are really clean. Hopefully if head checks out I can re-use valves. Measured 1 set of valves.
Intake
Valve dia 1.75"
Stem dia. 0.373"
Overall length 4.9695"
Exhaust
Valve dia 1.4630"
Stem dia 0.374
Overall length 4.9820"

66fs when you say 340 intake are you talking factory iron or LD340?
Im thinking a bit.much for 318?
I dont wanna do the same to the 318 that I did to the 273.

69conv. I was hoping to keep the 323 gears for highway tours. Fuel mileage?
Will the 318 not gimme a bit more bottom end to help make up for the 323?

Lelo thats the exact.combo I was thinking of. But I was hoping to be able to reuse cam/lifters from 273. Sounds like it might still be too much for the 318?

I hope.to.finish stripping the other 2 heads so will know more once.they are.checked.
Hope.to get checking into the 318 by the weekend.
Porting recommendations on heads or.exhaust manifolds?

Thanks.for the replies and advice. As I said the 273 runs good but im looking forward to this budget build with a little more grunt.