273 302 318 340 build

Lol yes a "slight" change in direction. When I started tallying up everything for the 318, and my machinist was offering up some of his stash (the 340), it made total sense to go this route. Ive already got intake n heads and hipo exhaust manifolds. Carb (possibly) Eddy 1405's and orignal 69 340 carb. So basically my "to get" list is head gaskets, oil pump bronze distributor gear(opinions? ?)
I have stock pump but looking to upgrade. Opinions?? Im thinking Melling HV with hardened shaft?
I appreciate all yours and everyone's help so far. Looking fwd to leaning on you and other for advice.
Yes I do see tire changes in my future(a few possibly) lol
Thanks!
You really changed directions.... good for you! Yes, use the larger heads for the compression ratio to be in the mid 9's; I get 9.6 or so with .028" thick head gaskets and the rest stock. (Deck height, rods, etc.)

DCR is coming out to a bit over 8:1 with the 270 solid cam installed at 106 degrees ICL, and .028" head gaskets, so you are as far up as you can easily go with that. Hope you have a good budget for tires! LOL