A500 and A518 Parasitic loss

jas0162 said

I wasn’t aware of the different stock stalls, not sure what I have. It’s just a stock replacement for the 318 engine, yes that’s all in and locked up at 75 mph.

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Here's my dilemma. I would like to install the A500 overdrive. Or even the A999 with lockup. I have 2 sets of gears (2.76 &3.23) tire dia 27.4". I rarely drive over 60MPH. So I'm afraid that my RPM's would be to low (even with 3.23's), if I install the A500, I'm not sure the overdrive would come into effect. And very unsure if the lockup would ever engage.
On the other hand. If I were to install the 999 lockup. I'm more sure things should work properly. maybe even with the 2.76 gears.
Any thoughts ? I just don't want to go through the trouble of installing the A500. And not be able to use it for all that it is worth.
I'm sure that the A500 , would work correctly (even with the 2.76's) if I drove at higher speeds. But at 60 MPH, just not sure.