1st 340 build

Here is the specs I have for my 340 if this will help you.
.30 over bore (4.070) using forged alum Ross racing pistons.
Eagle forged crank and forged H-beam rods with their ESP armor.
Full grove bearings from federal.
Total seal gapless piston rings.
Stud girdle from Hughes (which is so close to the crank it acts like a crank scraper).
SFI balancer, SFI flexplate, high volume water pump. Standard volume oil pimp.
Milodon's new road race oil pan. Dougs headers.
Crane roller cam, Hughes roller lifters, comp pro magnum roller rockers.
Edelbrock alum airgap intake, X heads with Ferrea stainless steel (2.02, 1.60) valves.
Holley electric fuel pump. Be cool ( cross flow) radiator with duel electric fans and I'm using Evan's coolant (same stuff they use in NASCAR, I recommend it if you get your block hot tanked).
All this stuff if bolted together using the strongest arp bolts that will bolt to the motor.
Hope this helps you some.