I have a '73 340 that I'm building and I'm trying to get a new stock type balancer so I ordered one from Rock Auto and it's a Power Bond PB 1004 N (Advance Auto shows the same number as a replacement). My original balancer is thicker by about 3/8" and I'm wondering if this will have any effect on the balance as this is an externally balanced engine. The original has "USE ON CAST CRANK 340 ONLY" cast into the face but the PB replacement does not. This is supposed to be a replacement balancer and I'm going to have everything balanced anyway so, will it work?