the rule about threads and bolts and nuts is that if the nut and the bolt are the same material, an equal length of threads to the diameter of the bolt will develop the full strength of the bolt. ie 1/2" of threads in length will carry a 1/2" bolt. if the materials are not the same strength, as in aluminum, if the strength of the threaded material were, say, 1/3 as much as the bolt then a 1/2" bolt would need 1 1/2" of threads in the weaker material.

so the person who said definately dont try to get by on the remaining theads in the hole is right on.

if it were mine i would take it to my favorite machinist and have him do the deed. i estimate it would cost 50 to 75 at most. labor.

tom w

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.