Purchased a 1981 F100 300 4.9 with a three on the tree. Nice solid old truck, but the head gasket gave up after 38 years. Thought I would do the job myself. Head is off at the machine shop. Replacing most of the old parts with some upgrades. Purchased the Jegs kit with the 4bbl intake, headers and Holly 390 to put back on. Everything came apart pretty well, looking forward to this site for help with the reassembly process.