heck dude what size gravel and how many scoops from the loader....on a general note..I think 3/4 inch is about 2000#'s per yard,was it wet or dry,and you said filled my truck,was it over the top in the middle,or a perfectly graded fill to the top?short bed or long bed?...
sounds like a fuel prob...just wingin' it here,I do know a bit about old small blocks and stuff,I know this is a bit different,but to me-sounds like not enough or too much fuel,when you go to start it,get under the hood and smell,with the air cleaner off,if you smell fuel at start up it is too...