Hey
Is your car running 200-205 when you are idiling? That seems high, I run my fan thermostat at 190-195. What is your temp on the road, when the car is moving? The best way to find out how reliable your car is is to do it the way I did... Put your toolbox in the trunk and drive it. I have put 8000 miles on my 72 v8 car in the past year.
I tune my car in the same manner as a normal SBC, stock timing and all. Seems to work best.
What conversion parts did you use? Desert hybrids is in your area, thats where I got my stuff from. What radiator are you using? I use a 85 corvette radiator and fan. My temps around town are 180-190 all day long and it gets around 205 at 80-90 mph on a 90 degree day here in detroit. That $150 radiator and fan sure was alot cheaper than that $900 unit from that other place.
Any other questions, feel free to ask.
Heres some pics of my car
http://hometown.aol.com/jtronika1/myhomepage/artgallery.html
Mark