I've recently put a new 350/330hp crate motor in in my 79' el camino. after 10 miles
or so the car developed a rattle near the transmisson when in mid throttle. It sounds like spark knock
but has been determined not to be. The rattle does not happen when it is run on a lift. (no load)
this problem has stumped 2 mechanics so far. Does anyone have an idea where I should look next.
You responses will be greatly appreciated.