G.R. is right about the early NASCAR side oilers. Is there ANY race venue that is harder on engines than NASCAR? They have always had a hard time getting their motors to go 500 miles, STILL do! Those guys are just brutal on motors.
As a result the NASCAR boys ran a special crankshaft and connecting rods. The journals are wider and today it is extremely difficult to find replacement parts for the bottom end of these engines. I don't know of any Cobra Club member running a NASCAR crank in their 427 FE. Unless your running 7000 + rpm for 500 miles you don't need one!
