My GMC 248 came without many of the bolts I will need to put if back together. Also the top radiator hose inlet / thermostat housing is missing. I've done some looking and American Classic Truck Parts had a set of bolts but it was supposedly for a 235 Chevy. Same with the top radiator hose inlet / thermostat housing. My question is are these interchangeable to the 248 or am I outta luck?