Need Help on Magnum 360/380 hp Crate Motor Tech Info

fatazzchuck said
Hey guy's,

I have a tech question about the p5249499 Magnum 360/380 hp crate motor with this roller cam .501/.513 lift with .230/.236 duration @.050 with a 108 lobe ..
Are the heads on this motor plain stock heads? If not what's been done to them?
I'm thinking of buying the heads/cam and installing into a Magnum 5.2 with Holley 750.. 904, Hooker super comp fenderwell headers in a 65 Dart 2 dr sedan weekend driver...with power brake and vacuum assist
What size stall converter and gear ratio would be needed?

Thanks

Steve Dulcich of Engine Masters has dynoed this cam in a 5.9 Magnum (the 380 horse 360 grind) in several 360 Magnums.( it usually gets7"-8, inches of vacuum , at a 1000 rpm idle, in a 360....) I would call Oregon Cams, ask for something in the 200-210 @ .050 zone, with a 110-112 lobe center, around .460"-.480 lift. (remember it is on a 1.6 rocker ratio, upgrade those silly stock valve springs with Hughes 1110 , or equivalent) Best of luck