Probably a GS.
I remember when those first came out in the mid '60's.
My family and I had a 1965 Tempest Le Mans for 13 years and 125 K miles. Unfortunately, It got bad rust problems at the base of the windshield and rear window, and in the trunk floor and rear fenders.
Part of what turned me on to these B bodies is that I was thinking that what I would really like to buy is a four door 1965 GM A body and then I found that the mid 90's B bodies weren't that far off in dimensions. The Impala is too flashy (don't want to go out of my way to attract thieves and law enforcement attention), too expensive, and for safety reasons and in South Texas I only buy white cars.
These B bodies have it all over the mid 60's cars with the suspension, tires, wheels, electronic fuel injection, corrosion protection, paint, etc.
LT1 Edit is used to edit or reprogram the program in the PCM (Powertrain Control Module), primarily for keeping your speedometer correct when changing tire overall diameter or rear axle ratios, changing the temp at which the cooling fans turn on, and maybe shift speeds. If one wants to experiment, they can fiddle with the air fuel ratio and ignition advance. The 108 mph limiter can be raised; whether it makes sense to do so depends on one's tires' speed ratings and the pressure carried. I doubt I will ever see the far side of 100.
I am happy with the factory ignition and fuel mapping, but want my fans to come on at lower temps. The factory PCM programming has the passenger side primary fan coming on at 225F and the driver side secondary fan turning on at 232F. I don't want my engine running that hot. It may help fuel mileage marginally by using less electrical energy to run the electric fans, but I am more interested in miles per engine than miles per gallon. If I put in a different rear end ratio, I will use it to correct the speedometer.
One can get this done by others for a fee, but with two cars I think it will be cost effective to do it myself.
Realistically, although it would be fun to hot rod one, the LT1's have enough power for me for any practical use. I bought the 9C1 for all of the heavy duty stuff, like engine oil cooler, power steering fluid cooler, extra capacity cooling, four wheel disc brakes, 3.08 rear axle (makes it easier on the engine), etc. The factory made the 9C1's to be bulletproof maintenance wise in pursuit. The 9C6 taxis were built to provide 200-300 K miles with minimal maintenance. I figure the factory made the Roadmaster to get maximum fuel mileage, and get through the warranty period and hopefully the first owner's ownership without any bad maintenance bills.
I plan to replace the black plastic front air dam outer sections with the 9C1 pieces for better brake rotor cooling. When I replace the front rotors, I plan to get the thicker 9C1 front rotors. I may have to get 9C1 calipers also.
Anyway, these are my plans, if my wife decides she likes it. I expect to have the 9C1 for at least ten if not twenty years. The only thing that would knock me out of it is if they triple the price of gas.
Keep in touch.
Rowland Hill, '95 Caprice 9C1, '95 Roadmaster
[This message has been edited by Rowland Hill (edited March 04, 2001).]