I’m after some advice. I recently bought a xd 302, heads flowed 400hp for a 351, stock converter, exhaust and inlet manifold, 2.92 diff. 600 vac sec Holley. Don’t know compression or cam specs, but it idles at 1200 with 8 inches of vacuum.
Its acceleration and mileage are garbage.
I’ve put in a 3000 stall. A dual plane highrise manifold, extractors and 3.9 9” is coming.
The question is what to replace that huge cam with. And do I need to change any of the valve train components besides lifters?
Any suggestions or horsepower estimates for when it’s all put together appreciated.