If you do decide to have your manifolds machined, I would suggest strongly that you assemble the intake and exhaust manifolds back together, leaving the nuts an bolts loose.
Then install the assembly to the head without the gaskets.
Then tighten the bolts which hold the manifold assembly to the head.
Once the bolts going into the head are tight, tighten up the bolts and nuts which you left loose earlier.
Remove the manifold assembly from the head and take it to the machine shop and have the assembly machined as a unit.
Last edited by Phak1; 04/16/2023 1:18 AM.
