Howdy gang, cosgig here! I'm having a real head scratcher problem with a crank pulley situation, so I'm turning to the experts for help, that's y'all!! Here's the sitch!!!...
Take a look at the 2 balancers pictured, the orange one is from a 69 340, the other from a 72 340! Both are for forged crank, and so one would think that the crank pulley from the 72 would bolt right to the 69 balancer, but you would be wrong! See, it appears that the 72 pulley is drilled for a cast crank balancer bolt pattern, and in fact when mocked up to a cast crank balancer, it matches! So, what's the deal here? Has anybody ever heard of this? The 72 balancer is clearly a forged crank balancer, and the block was cast on 1-20-71! The 2nd pic shows the 72 balancer next to a cast crank 73 340 balancer, obviously different!!
Any ideas here? The 72 motor came from a 72 Duster, and was original to the car and standard bore, so it hadn't been messed with, still had the stock exhaust and everything?? Any input is greatly appreciated! Geof
Take a look at the 2 balancers pictured, the orange one is from a 69 340, the other from a 72 340! Both are for forged crank, and so one would think that the crank pulley from the 72 would bolt right to the 69 balancer, but you would be wrong! See, it appears that the 72 pulley is drilled for a cast crank balancer bolt pattern, and in fact when mocked up to a cast crank balancer, it matches! So, what's the deal here? Has anybody ever heard of this? The 72 balancer is clearly a forged crank balancer, and the block was cast on 1-20-71! The 2nd pic shows the 72 balancer next to a cast crank 73 340 balancer, obviously different!!
Any ideas here? The 72 motor came from a 72 Duster, and was original to the car and standard bore, so it hadn't been messed with, still had the stock exhaust and everything?? Any input is greatly appreciated! Geof
