Chad if you look at the that pic you will see that if the ground flat spot and mostly the opening is moved to the front toward port 3 some, no filling is necessary. Forget the original hole. Others have been successful.. Bobcat said he did not braze..I will not pay to do some thing if I can do it myself..Carefully fitting an adapter and bolting down with a gasket can be done at home. Make the adapter yourself so you can place the bolts where needed for the best clamping and matching of the opening..More smaller Flathead machine screws work better than BIG bolts.chad":12z7bmm3 said:the 2nd pic above (middle 1) shows the danger of no 'build up' before 'take away'...
I would prefer to mill grind or file the manifold whatever angle that that gives you the best sealing and location of most full sized carb bore. If you angle the manifold sealing and thickness for bolts get to thin on one side. best to make the angle on the adapter.Royals65i6":376w4brc said:When milling the intake, should I try to match the slope of the actual log or the old 1.75" opening? How much does it matter?