is it possible to up 6 inch rods on a stock 350 crank that came with 5.7 inch rods? i have seen that there were ones for each rod size but i dont understand why you would have to do that. thanks Ty.

 

u would have to look out for the top of the piston smackin valves in the head but i dont see y it wouldnt hurt

 

Usually you use a 6 inch rod when you build a stroker motor, like a 383. I don't think, but not sure that it would work with a 350 crank. The 383 crank is actually a 400 crank. When using a 6 inch rod you have to buy the pistons that match that rod. You can NOT use a standard piston with a longer rod. on a 6 inch rod, the piston wrist pin (where it attaches the piston to rod), is up inside of the bottom oil ring...in other words the piston almost looks squished a bit, shorter than standard.

when you build a stroker motor, for example, there are many ways to do it. Let's say you're building a 383 (a 400 crank in a 350, bored .030 over) anyways, you can use a 5.5xx rod, a 5.7 rod, or a 6.0 rod. The difference is how the motor runs. the shorter the rod, the more torque, and also more wear it causes on the cylinder walls. In my opinion, when building a stroker, the 6.0 rod is the way to go, but that's my opinion. Hope that helps some.

 

You would use a 6" rod in a 350 for exactly the same reasons
But you might want to read this first
http://www.iskycams.com/techtips.html#2005

 

well im acctually building a 377 and the pistons i got are for a 6 inch rod and a 3.48 stroke and i have a stock 350 crank but i wasnt sure if the rods would work on that crank or not. i didnt know if i had to but a 400 crank with a 3.48 stroke or use my 350 crank and use bearing spacers.

 

You just need pistons to match. Crank doesnt care how long your rods are. The wrist pin in the piston just gets moved up to compensate.

 

alot of after market cranks are designed around 5.7 or 6" rod because ease of balancing and the counterweights hitting the bottom of the piston. You will be fine with 6" rods as long as your pistons are for a 6" rod.

 

that just answered my question right there thanks guys