I have a 1966 Oldsmobile Toronado, the crank isn't worth using. Found a 1965 Oldsmobile 425 crank that's perfect. Will it work?

 

Yes it will fit. If you look at the number on the lobe you'll see both crank shafts have the same number. 1965-67 400 and 425 used the same cranks. John


Here's an example of the number to look for.
DSCN3529.jpg

 

John, thank you for the information. I'm very grateful. Mike

 

Some early 1965 cranks had a smaller damper retainer bolt, with lower torque spec.

 

I've come across that on 330 cranks but didn't realize that some of the big block cranks had it too. Always learning!

 

John, I got my dream car a 1966 olds Toronado. When I got the fuel system restored I started it. Five bent push rods. After working on the stuck value and removing the intake to remove the bent push rods. I found a small piece of the oil ring cage in-between two of the lifters. Engine came out and disassemble. Everything in side was new, no wear on lifters. Timing chain thigh, clean with a 10/20 crank. It was junk, mains looked good but the rods were shot. Number 2 piston damaged, cylinder was untouched. Can't believe it but no damage. I feel it was rebuilt right before it was parked for twenty years. The person I got it from said it ran but the fuel pump was bad. Whole fuel system was plugged. Oil was clean, transmission fluid was cherry red. With that all being said I feel there's a chance to rering this one. I have no way of knowing what pistons was used. Have mic it yet but no top groove on the cylinders. Not sure what the bore is. Is there a way to find out what pistons were used? Can send pictures if it would help.
Mike