I believe the engine to bell houseing are 1/2 in. coarse thead. The manifold bolts are 3/8 coarse thread. Use your old bolts for the length. I like grade 8 bolts. The Ace hardware store I use has a great selection of grade 8 fasteners.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum