I can help you with converter selection. While dyno #'s are always helpful, I don't have to have them, but I do need some more information. You'll need to locate your cam card and provide me with lift, advertised duration, duration @ .050", lobe separation, and intake centerline if possible. I also need to know vehicle weight, carburetor size, header primary tube size and length, collector size and length, exhaust system size/design/length, style of rear suspension, tire width and type, and intended use of the vehicle.
I can tell you right now that if the lobe separation you're stating is correct, then you're going to need to change your camshaft before you go any further. The valve overlap created with a high duration/tight lobe separation design cam is going to be such that you're going to be pushing a lot of your air/fuel mixture right through the cylinders and out into the exhaust on the overlap event. Once the engine builds some RPM and cylinder pressure begins increasing, the pressure rise in the cylinders is going to spike so rapidly that detonation is going to be difficult to control.
Please feel free to contact me at any time. I'll be happy to help you get everything sorted out.
