I figured a curve with vacuum advance would work best.
No experience with locked out timing though so I figured I would ask.
Couple more more questions though:
1) If high gearing as commonly found in street cars causes low rpm / high load conditions, and droping compression could keep this from being a problem when using locked timing, couldent lowering the gear ratio make this work as well? If so, would the gearing have to be so extreem that it wouldent even be streetable? I imagine that low gearing in conjunction with a high stall or a manual trans would be plausable, but then we are getting into a high rpm / high powerband application again. But hypothetically speaking, what about a low stall, low gear combo such as 1500-4500 powerband, th350 auto w/ 2krpm stall, 29" tires and 4.56:1 gears?
2) How could 20 degrees of retard be too much? Total timing would normally around 35* in most applications as far as I have seen. If the timing were locked in those same applications that are 35* total w/ a curve then it would be locked at about 35*right? With a 20* cranking retard that would mean 15* while cranking and 15* till 800rpm. I don't see how 20* retard would be problematic.