Most carburetors bolt on with 5/16" bolts. You can easily lift a very heavy V8 using these 4 bolts. Actually, in straight tension a 5/16" bolt should take over 1000 pounds. > Stock hardware :-) what ford gives ya > > I have even gone as far to lift completely wet engines with oil, ATX and ATX > fuild still in them this way, without nary a bent intake bolt.