I got a 67 Oldsmobile 425 that I want to stroke but I can’t find a forged 455 crank to put in it without costing an arm and a leg. I keep seeing forged Pontiac 455 cranks for sale. Would one fit into my olds as long as journals are the same size?

 

No, the Pontiac crank will not fit. You can off set grind your 425 crank and use BBC connecting rods.

 

How much power are you looking to make? The nodular cranks are good to about 600 if done right.

 

The factory forged 455 cranks are extremely rare and priced accordingly. As Mark points out, unless you think you are going to be making incredible amounts of HP, the nodular 455 crank is fine, and if you really ARE going to make that much HP, the expense of an aftermarket forged crank is nothing compared to what you'll be spending on the rest of the motor. Don't kid yourself into thinking you're going to make 600 HP with a budget build.