Switching to the nv4500 will get you to 55 mph at the same rpm that you were running with the old tranny. If you put the 348 in you may not want to spin it as hard as the 350.
Ask your self how fast do you really want/need to go?
In Wyoming 55 isn't fast enough for the highway but it doesn't sound like you are going take it out on I80.
This all assuming your current tranny is 1:1 in high.
Last edited by MisterR; 03/02/2013 10:45 AM.
