I had questions about the f236, both 4.2 and 4.7. do they both have forged internals? Does anyone have the camshaft sizes (lift, duration).are these interference engines or no? I have a line on a Ferrari California intake manifold, I kno they are direct injection but i can drill and weld injector bungs. I am swapping this engine into a 80's 951. Do you think keeping the stock Maserati intake, Ferrari, or custom it setup which of those would be best for performance?