My son & I are working on an mostly original truck, but it's too slow to really enjoy. We've been told to "cut it" and make it a V8/AT/etc... or raplace the ring & pinion from a 3.90-4.11( not sure what we have now)to a 3.38 or... change the tranny to a Saginaw 68-75 model 4spd (I can't see how that'll help- 4th gear is still about the same ratio). We're really stumped. What should we do to take a 235/4spd and make it run down the road at 65/70mph without it's being wound up too tight?