I have a 67 Dart, 727 Trans, 340 engine for power (not yet built), will likely use aluminum heads, decent cam (solid flat tappet or solid roller), slightly less than 10:1 compression to run pump gas.
I've been researching gear ratios and automatic transmission options for street/highway use. I know this is the same problem many have discussed, but I am still trying to get the best of both worlds without installing a transmission or overdrive unit that does not fit the car (major rework to frame/floorpan). Meaning, fun to drive on the steet, but decent RPM's on the highway, not interested in the droning noise of high revs going down the highway. So, one option I thought was of interest was the A998/A999 trans, lock-up would be nice, but those are difficult to find, unclear on part availability as well. So, what about the option of using a low gear set (2.74, 1.54, 1)in the 727 trans. Seems like you can get the benefit of a lower starting gear, more torque at the rear wheels initially, yet still have a final gear ration that is somewhat decent on the highway. Here's a comparison between two 727 gearsets, attached image.
It compares the gearsets wiht a 2.94 rear gear, 28 inch tire. Its just a rough comparison, no doubt the inputs might be off here and there.
I could also go with a 904 that already had this setup, if it was reasonably built.
Anyone have actual experience with this setup (pros, cons)?
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