What is the best way to get an overdrive auto in a 67 Barracuda?

jbc426 said
There are a few other advantages aside from the larger rpm drop in OD. The 1st gear ratio is 2.76 to 1 vs 2.5 to 1. The converter can be built to utilize a lock-up clutch system, which will drop you rpm another 250-300 rpm.

Also, I had my converter made to bolt right up to my factor flexplate without the use of any adapters. I see some of you spent several hundred dollars more on adapting the 3-bolt GM converter to your cranks. The cost was the same for my converter. I did have to provide the measurements. I opted for a top-shelf 3600 rpm stall converter with a 3 carbon fiber lock-up clutch system. The thing is friggen awesome to drive on the street and at the track with the 200R4.

I wanted to take my car for a spin to refresh my memory on excact numbers that were in question IE rpm vs mph an so forth but the county decided to dump salt on the frosty roads this morning, lets just say driving between 55 and 65 my engine turns at an rpm which makes me very uncomfortable without getting too technical with exact numbers. I don't want to sound obtuse here but your converter is a 3600, when you are cruisin trying to keep the rpms down say under 2600 does your converter heat up or stall or does the "lockup" part of the converter prevent that? I'm not sure exactly how that works, I would like a 2800 stall but I don't want it slipping or causing excess heat at cruising speed. Does your lockup work on a switch or does it kick in automatically?