Do you dyno test for anyone other than your own in house builds? The reason I ask is --Have you tested many Chev's--particular the beloved 383 Chev? I had an opportunity as recent as 2 weeks ago to test one--Edelbrock heads 170cc, roller rockers, RPM Air-gap,Schoenfeld 1 5/8-1 3/4" sprint headers, pumpgas, Edelbrock RPM hyd flat cam(234/244 .488/.510?). With the 750 on this engine it made 409 HP/442 tq, His carb 400 HP/432 TQ. The customer takes it home, installs it and reports that it's AWESOME--which I do like to hear.
What I tend to take away from this is: 1. 383 Chev's are a formidable engine package.
2. 360's (stock stroke) Often equal or even exceed similarly built 383's.
Of course you can throw money at either engine 'till you are blue in the face but that is not what this build or this thread is about. I do wonder how a 383 Chev with some Vortec heads built along these lines would fare. J.Rob