My 2 cents is to get a chevy 4 speed auto
While gear-splitting sounds exciting, it doesn't work particularly well with a stock-cam 318/904, on the street.
The 904 ratios are 2.45-1.45-1.00
The GVod is .78. Combining them you get
2.45-1.91-1.45-1.13-1.00-.78od.. The splits are
.78-.76-.78-.88-.78
With the od, you are likely gonna shoot for a 2.76 final drive so 2.76/.78=3.55s in the back.
Minor performance upgrades, usually means still running the stock cam. Therefore, the power will peak at about 4000rpm, and your shift rpm could be 4400.
Ok lets convert this to mph at WOT. Assuming 27" tires;4400 is;
38 in first,
48 in first-over,
64 in second,
82 in second-over,
93 in direct.
93 is gonna take you ~15seconds, so you better choose your spot carefully
64 will be your everyday cut-off, so you are paying $2850 to split one gear, and for the overdrive cruiser gear.
The thing is this; The stock cam 318 loses torque so rapidly after 3000, that the horsepower curve is nearly flat from there to the peak. So splitting that gear may possible gain you something, in the zero to 60mph contest, but my money is on about nothing
The other problem is that the GV requires a power-cut to outshift, which you would have to do at 48 mph to get into Second. So very possibly, probably, any time you gained on the in-shift, you are gonna lose it all, on the outshift.
So, honestly, the GVod is just gonna end up as a novelty, and a cruiser gear. $2850 is a lotta coin for just a cruiser gear.
IMO
that money would be better spent on a 5.9 Magnum and leave whatever gears are in your car, but install a 2800TC
more coming
