I recently bought a L31 vortec long block that im gonna put a HSR on and put in place of my 305 but i hit a major roadblock. While tearing the motor down to put in the forged pistons i noticed that the ******* who sold me the motor forgot to mention he spun a bearing (said car was wrecked and his son almost died, ya ok pulled me in like a sucker) so now i paid $500 for a motor that i still need a crankshaft for because the damage to the crank is bad about a 1/16 of an in of material gone maybe more. So now i need a new crank but some one near me on craigslist has a crankshaft from a 350 goodwrench motor for only 75 bucks it looks brand new would this crank work (im assuming it 1 piece rms but u guys would know more than me about them motors i never looked into them)? Also is it the same strength as the one i have because i heard the L31's have good cranks and rods any help is appriciated thanks.

 

No, the Goodwrench 350 uses the 2 piece rear main seal. There are adapters available, but they're not worth the cost. have you even checked your local salvage yards? Any '87-up 350 crank will do.

 

ok thanks for the info that crank on craigslist was cheap and brand new so i was gonna try to push up on it but ill have to check the salvage yards for one

 

I believe any 87 up 305 crank will also work but require a balance, But a 1pc RMS 350 crank shouldnt be a hard thing to find.

 

wouldnt 305 and 350 cranks have different counterweights?

 

Same casting, different cutting for balancing.

 

hence my comment about needing a balance...

 

well i just decided to buy an eagle crank and call it a day i figure it will hold up better too thanks for the help tho

 

wise choice.

 

Hopefully you dont have the common Eagle crank failure where the first rod journal likes to break off