[Ironangel]

Sorry for the late response, don't get bummed out because an L46 is the Corvette RPO number for the same L31 350 ci Vortec V8... https://www.google.com/search?q=gm+l...+specs&ie=&oe= Somebody else on the board here just installed that same motor and was pretty happy with it, might be able to find it in the search box above? A carbed Vortec will require an intake manifold designed for a carb, a spreadbore design in your case since your using the greatest carb ever made, a Quadrajet. Do your research, when you get that thing running your going to smile and realize you bought the right motor... A 1/4-20 bolt gets 10 ft lbs, double that for 5/16-18 bolts, 20 ft. lbs. Double that for 3/8-16 bolts, 40 ft. lbs. 7/16-14 bolts get 60 ft. lbs and 1/2-13 gets 90 ft lbs. Those are grade-5 specs. Unless your using a specified nut you don't need grade-8 bolts. A grade-8 bolt used in a shallow threaded cast iron hole such as a motor mount hole can lead to BIG trouble!