Selection of Torque Converter and Rear Gears for Hot 340

AJ/FormS said
I totally get that;
I got me a GVOD so I could run any rear gear I wanted to, and I had a shed full of accumulated pumpkins.
My 367;blew up some ex race-gear 5.38s; and zinged off a couple of teeth on some used 3.91s; I traded the 4.10s for 3.55s,sold the nearly new 4.30s;and no takers yet on the 4.88s; so I totally get you,lol.
Finally I got the Commando box with the 3.09 low, and re-installed the 3.55s. Then it was , bye-bye to the byway blues, with a 2.77 equivalent overdrive gear.
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What is the OD ratio again? Truck OD trans is different IIRC. I keep forgetting. CRS!
So since I have you this far, would you be so kind as to break out the calculator and do a quick figure on the ratio changes for the 4.10 & 4.88's please?
Thank ya AJ.
Garrett Ellison said
I like deep gears and avoiding highway travel, but that’s just me... now saying that, I can vouch that hot rpm happy small blocks in heavy vehicles work very well with 4.56 gears.
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No doubt GE, no doubt.
Even better when you run a ride around 3K or less with a big cam.
:eek: :steering: