[HWYSTR455]

Overkillphil- I'll buy that, worked pretty good for me, when it worked! The speed sensor crapped out within the first 100 miles, had it replaced, and I have to send the control unit back for repair, but, unfortunately, I can't find the receipt! Here's a scenario though that it wouldn't work well without a vacuum switch: Over 50 rolling into the throttle without a downshift. Or am I missing something?

Anyway, after listening to all, I thought about it, and I decided to go with a combination of all the above, the B&M controller, the adjustable vacuum switch, the brake switch (of course), the electronic delay, and a GM vacuum delay unit I listed the part number for. I found the Superior parts on eGay, at the OregonPerformanceTransmission store, and the GM vacuum switch at RockAuto.

I'll set the MPH on the B&M unit to like 50, add about a 3 - 5 second delay (for starters) on the electronic, and start with the vacuum switch around 5 inches of vacuum, which I'll connect to manifold vacuum, with the vacuum delay between. I may start out first without the electronic delay, see how it works.

I figure the vacuum delay and the electronic delay (if used) will prevent the 'cycling', the vacuum switch will unlock on heavier throttle, and since it's a 4th gear pressure switch setup, the B&M will keep it from locking under 50 mph. Sound like it makes sense? Opinions?

Now, if I could do a throttle position sensor or something, and have it unlock on coasting, that would be optimum. Maybe reverse a full throttle switch?