buy a torque adapter off the tool truck they come in all sizes and use a touch of anti-sieze on the bolts and clean em good on a wire wheel run a tap thru all holes. manifolds warp because of heat cycles 1100 degree exh coming out. even when rebuilding a v 8 you better resurface all the part mating surfaces especially the intake&exh manifold and block they will all be warped cast iron or aluminum it will be done at any quality machine shop who rebuilds motors if they know their stuff a starter wrench will work like the old guys heating up a wrench and bending to the shape they want i got a few in my tool box.now i got 13 posts
