Well, I did more "indepth research" and some rough calculations based upon Snowtoy, Gillesdetrail, the others who posted their experience with going to lower gears in the 3rd member - higher gear ratio (4.10 to 4.56 ring & pinion).
It looks like I was wrong in my thinking.
![Smack! :smack:](https://board.marlincrawler.com/Smileys/marlin/smack.gif)
YES, it looks like if I swap 4.10s to 4.56s, it will put the RPM at 50, 60, 70, 80 MPH in 4th and 5th gears at a higher torque number (based on my desktop dyno software) within my usable the RPM range.
I will do a spread sheet in the next couple days.
Crap!!!
![Thud :thud:](https://board.marlincrawler.com/Smileys/marlin/thud.gif)
....So I'll have to grow my Toy Kitty piggy bank a lot fatter!!
![Yikes :yikes:](https://board.marlincrawler.com/Smileys/marlin/yikes.gif)
I will want to dyno test my new rebuilt, then swap R&Ps to 4.56, then test it again.
I still want to dyno test another camshaft profile, maybe 2.
Gnarls.
![Spin :spin:](https://board.marlincrawler.com/Smileys/marlin/spin.gif)