Will it work, or is the rod stroke ratio different? Thanks

 

its exact same crank should work fine 89.00 stroke on both only different between ls and b20 block is the bore 81mm vs 84mm both use a 137.00 rod with exact same r/s ratio

 

Thank you sir, wasn't sure about the r/s ratio
Wasn't really up to swapping cranks

 

LS and B20 cranks are the same....The only thing that differs between the 2 motors is the bore diameter. 81mm vs. 84mm.

 

crank and rods same part numbers

 

Don't worry about the rod to stroke ratio! Sure, it's a little worse than a B18C1 and worse than a B16, but just because the rod ratio isn't that great doesn't mean that it's going to break down on you in 5000 miles if you rev it high. There are a bunch of guys on here spinning LS motors to 9000+ without incident. Balance the motor properly and have it assembled properly and you'll have no issues.

 

I'm not looking to rev any higher than the stock limit.