Recently acquired an '83 Ram 50 Sport with the 4D55T. Previous owner had the injection pump rebuilt and never put the pump back on. I went to mount it up and the nuts wouldn't thread onto the studs more than a few turns. Put a wrench on them and they started to cut new threads on the studs. I'm wondering if anyone knows the thread size of those studs, and if they're replaceable so I know I can get the correct nuts. Thanks for any help.