About time you put a real engine in that thing....well its still not a real engine but its a little closer....Should be interesting to watch....Good luck...
Thanks man. I'm pretty excited.
Did a little number crunching to get some numbers. Number are good.
Here's what I came up with:
The 3.0 makes 162 peak torque. OHV 4.0 makes 220 peak torque. That makes the 4.0 a 35.8% increase in torque over the 3.0 if you look strictly at the torque numbers.
The kicker is what trans you use. If you use a 4.0 m5od, the gear ratios in the tranny are numerically lower than those in the 3.0 m5od. So your effective torque increase won't be that 35.8% over the 3.0 (since the 3.0 will obviously be using the numerically higher geared 3.0 trans).
Using the 4.0 trans, the percent increase in torque over the 3.0L is 24.12%, 26.54%, and 18.60% for gears 1-3 respectively. Gears 4 and 5 are the same in both the 3.0 and 4.0 case, giving the effective torque increase of 35.8% as calculated previously.
Using the 3.0 trans with the 4.0 yields the 35.8% increase in effective torque for all of the gears, obviously.
I'd say using the 3.0 internals in the 4.0 case is well worth the effort.
I just sent money for a 4.0 trans case tonight. My 3.0 trans internals will be living in there
I guess what all this was getting at was I'll be seeing a significant increase in performance, even if I just keep the 4.0 stock. While I have it out I'd like to have some machine work done (gasket matching, head work, etc) that may increase torque as well. We shall see.