Understood. I'd agree with you on the early 90's trucks. The later Vortec motors from the late 90's and early 00's were MUCH better performing engines. both in power and fuel economy. Performance does not equal longevity though. I've never had one so I can't comment.
I can say the TH-700R4 has proven to be a very good tranny for stock vehicles and as long as you aren't looking for a race transmision or a heavy towing trans, one should go 150K without any problems.
My 99 4.3 Vortec in a Safari ran great 'til 140K miles (with a 700R4) when I traded it in. I was getting some carrier bearing howl near the end but it never gave out on me.
Speaking of my 99' 4.3 liter...
SHS,
If I were to give any advise on the late 90's or early 00's trucks, I'd say look into the recalls involving the DexCool coolant and the failure of the intake manifold gaskets because of it. The 4.3 liter used from 1995 to 2000 was covered if used in the S10/S15, and SUV's on the S platform.
The same 4.3 liter was used in the Astro/Safari and C/K trucks but NOT covered by the class action suit. Be careful with the 4.3's from that time if you do go with the six.
I developed a leak in mine at around 100K and had to pay out of pocket to get a new gasket put in. No big deal on a truck but on the Safari, everything is under the dash and impossible for a do-it-yourselfer to tackle.
Good luck in your search,
Chris
thats why they call the fluid "death" cool.... one of the biggest blunders GM has had to deal with. It goes for the cars as well.. as of right now i do not wish to own an "american" vehicle.. not saying japanese vehicles are perfect but they really have a much better overall track record. hard to argue that imo...
i would get the chevy truck with the 350cu motor.. rock solid. nothing more nothing less if i had to get one