Logan Hughes
Active Member
Two years ago I rebuilt the original 440 in my GTX. Since it is a numbers matching car (owned for 50 years this month as second owner), I retained the original block, heads, intake, exhaust manifolds, crank, and carb. FYI...I upgraded all engine internal components, balanced rotating assembly, much better cam, and had bowl work done on heads. I had fairly recently rebuilt the original AVS so I reinstalled it after the engine rebuild. It works great, except the primary shaft seems to have some resistance and does not want to return to the idle stop with the original return spring. I could turn it manually back to the idle stop. So I added a second spring, which worked for awhile. Now it's doing the same thing with 2 springs. Anyone heard of this? Suggested solutions?