Brian’s stepped up again.

I took the g/f for ice cream in it last year? No extrude honing the exhaust, I just hogged them out the old fashioned way. I don't know if anyone has looked at the passenger side exhaust manifold on a 71 340, but even getting as thin as I dared, the outlet is only a touch over 1 7/8". Can't speak for everyone, but my motor is .030 over, with a custom piston and pretty standard .043 ring pack, off the shelf crank and rods. I don't have a lot of money, I don't have the money to try 30 of things to see what is best. But I don't mind putting in the hours to tweak things to the best of my ability