IIRC there is no disk/drum M/C that has the prop valve built in, youll need a "combo valve" from a disc/drum car. 67 had disks up front so you could get a 67 M/C. I used a jeep combo valve and it worked fine, or spring for a proportioning valve that you can turn but youll have to plumb that in, not mandatory if you got the proper combo valve. lowering these with the front torsion bars alone will fool the front alignment. If your looking for a proper lowering, look into dropped spindles. best thing you can do with that motor (it looks great BTW) is to mill the head .090-.100 and get your compression up from the 7.x that it is. Im not sure youll need the Aussie 4bbl as the 2 works pretty good with a 350 CFM 2bbl on it. Headers are fun, but the rear gear is probably the most bang per buck. Get out of that 2.76 hiway rear and get into a 3.23 or a 3.55. 6's like forced induction as the head is not what you would call a performance piece. Small valve and a small bore. Eaton M60/90 is a good cheap supercharger. Check out the H.A.M.B (
Technical - Eaton supercharger conversion to top carb mount) for many Eaton transplants. Easier than a turbo? Depends on how you want to run it I suppose. Aussiespeed makes a supercharger /6 intake. $$$
