3.31” Crankshafts

Poly 318s used the puny connecting rods found in the 273. The poly crank I have is heavier than my 340 steel crank, and the 1-2 rod throw is not drilled through like it is on the 340. At a guess, I'd say that material was removed from the throw when it was offset by the heavier 340 rod and piston.

I have Bill Miller rods for one of my 340s, but it's not together yet. Per Bill hisself, they're good for 100K+ street miles. I know the the guys at (long-defunct) Warrior Racing were been using them in street engines in the 1980s, and had at least one daily-driven street/strip engine with 'em that was well over 100K miles. With BME rods and SRP pistons replacing the stock 340 parts, my reciprocating parts weigh 9.2lb less than OE. There's going to be a few pounds of crankshaft left on some machine-shop floor after balancing.