yes,mine did this after transplanting it from a MH to the 88 truck.

i used the felpro vallypan that has the heat crossover blocked,it came with 4 thin paper gaskets. 1 for each side of the tin pan.

i put it on dry and have had no problems. runs like a new engine compaired to how it ran with a vac leak.

IIRC it was a felpro 1215HP valley pan.