the first tank (idle @ 180*), i leave it on the starter box with the wheels off the ground.
the second tank through 6+ (run WOT @ 200*) i'll take it to a track or a parking lot that I sweep (little rocks are bad for your car). it doesn't have to go WOT the whole time, but I do try to get it running at 200* as much as I can. You might need a big parking lot for this. I prefer the nearest college with the less dust/pebbles.
and no, you don't need a temp gun. you can do the water drop as mentioned below or spit on the glow plug. Make sure you check the temp at it's hottest (right after going WOT for a few seconds).
ok thanx now the car is built jsut no radiop yet eninge is ont he clutch spins both ways but when i install the engien i can push the car forwards btu now back wards its liek the gears stop its on a 710