thermostat part number please

Don't have a part number handy but if the earlier T-stat is too large then you need the later model T-stat which I think came out around '76 or so. I run the chrome T-stat housings on my cars and don't really have a problem sealing them up . I buy the cheapo chrome ones from summit racing. Before installing it I ruff up the chrome a little on the bottom side, throw on some permatex blue rtv and put it together. The biggest trick with the cheap chrome ones is since they are pot metal you can not over tighten them because they will warp easily and never seal again.