I am considering swapping the 727 in the Cuda for a 518. I have 3.91s now and was just wondering what RPMs the different rear ratios give at hiway speeds. Say 70ish MPH.

I know there are other variables, but I was just looking for some ball parks from those that are already running the 518s.

With the tall tires and loose converter, the engine spins about 3,000 RPM at about 55MPH now.

Thanks!

Master, again and still