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Just wondering what the correct size of bolts are for connecting the stock exhaust manifolds to the exhaust pipes on a 1970 Roadrunner/383? thanks

Had to replace the gasket on one of my stock exhaust manifolds (383)...was leaking. Looks like they both need to have the port gasket surfaces re-surfaced. Does anyone know where I can get that done hopefully somewhere on the Westside of the Metro Detroit area...I live in Eastern Washtenaw...

Have to replace my exhaust manifold gaskets. Found out the holes go into the water jackets, currently have bolts instead of studs so bought a stud kit. Have also found out have to use a sealant when installing the studs but have another installation question. 1. The "kit" came with 4 extra...

Have a 70 Roadrunner (stock 383 with stock exhaust manifolds). Need to replace the gaskets and found out that the factory installed studs instead of bolts. Current I have bolts, so have ordered a stud kit and also found out the threaded holes go into the water jackets. So I need to find out...

Just purchased a copper exhaust manifold gasket kit for my 70 Roadrunner (stock 383 auto). What size are the "stock" exhaust manifold bolts (not studs) (insturctions list 5/16"-18 or 3/8"-16). Torgue settings for both sizes of bolts on the instructions are different using Oil or Moly...what do...