Your best bet is to pressure test the cooling system. That way you know for sure. Also, has the engine oil been changed since engine break in? John
'68 C-10 - 250 with Edelbrock 600cfm 4 barrel, Offy intake, Hedman headers and true duals, HEI, MSD 6A box, relocated gas tank
Soon to have: T-5 tranny
| 
