We'll test anyone's engine for $550/day. But in a town where the sign reads "Population 1081" before the big mine layoff, it's mostly our own stuff.
I have a 350 core with some Vortec heads sitting out back. Never tested them though.
A while back I alluded to a 383 Chevy we built. Local customer requested 450 HP for his show truck because he could get that on a budget of X$ from an outfit advertising on the internet.
Ah, well, we kept to the budget, and.............with a carburetor he got 392 LB-FT @ 3,000 rpm, 484 LB-FT @ 5,000 rpm and 518 HP @ 5,800-6,000 rpm
With the Holley Terminator FI not fully through it's learning curve, 399 LB-FT @ 3,000 rpm, 472 LB-FT @ 4,900 rpm and 511 HP @ 5,800 RPM.
10.1:1 compression, Pump gas, Victor Jr intake, AFR 1034 heads, custom street solid roller 236/242 .564/.570 113 LSA 109 ICL, 1.5 Scorpion roller rockers, and using the long tube headers for his truck.
I'm still a 383 Chevy novice because that is the sum total of my 383 experience.