I built a 350 Chevy motor for one of my local Mopar customers who bought a 1972 Chevy 3/4 ton 4X4 for cruising around on the week ends, no rock crawling, no off road driving or any kind of racing
I built him a 572 C.I. pump gas Hemi motor several years ago hence doing the Chevy now
I used a new steel 3.750 stroke crank with a set of 6.0 long rods and a Lunati hydraulic roller cam that is right at 224@.050 on the intake lobes and around 232 degrees @.050 on the exhaust lobes ground on a 112 LSA for EFI with a set of the small 175 CC intake port Trick flows heads and a set of their aluminum 1.6 ratio roller rocker arms. I used a Holley EFI Sniper along with their Holley Sniper ignition and with their lock out hyper spark distributor.
I used a set of Icon forged pistons made for a 6.0 long I beam SB Chevy rod from Speed Master, it has right at 9.46 to 1 true mechanical compression ratio, a little less than I wanted but I decided to leave it their due to it going in a heavy 4x4 and it setting a lot so the pump swill could, and probably will, get worse when sitting between use.
It made 427 HP at 5600 RPM and 434 Ft. Lbs. of torque at 4700 RPM on the second pull with out tuning with a 11.2 AFR at 3100 RPM to 11.9 AFR at 5800 RPM.
I didn't want to wear it out on the dyno chasing numbers that won't apply in the truck with the full exhaust system and so on so I had it pulled off the dyno after the third full pull and brought it home, it had a oil leak between the intake manifold and the front and rear sealing surfaces on the block, I had used a stock type OEM rubber gasket their which didn't seal up
I'll do the final tuning in the truck with him driving it
I'm going to be building a pump gas Mopar 360 LA with a 4.00 stroker crank and probably a set of Trick Flow 190 CC intake ports and hope it makes more power than this Chevy does