First I'd like to state I think there should be a special forum section for silly little questions like mine that automatically are deleted after a week or so.

I have a 427/454 ( still not sure, looked and didn't see anything on the flywheel that struck me as a balancer, and being a novice have no idea what exactly to look for). and it was setup with the fuel pump mount capped and ready for an electric fuel pump. I have a mechanical fuel pump to install, a nice edelbrock pump, but the pushrod is missing.

all this to ask a simple question, which length? 5.75 or 5.95"? is there a way to tell?

will this one work?
http://www.summitracing.com/parts/ARP-135-8701/