LOL...thats cos temp guns are silly money over here...and a lot of people dont need them.
I dont have one either....dont think i need one myself (*cough*bighead*cough*).
No but seriously you can tell if your engine is running too hot, and as long as you have that blue smoke trail you are usually fine

. Besides i have a stupidly expensive temp measuring device at home....its called spit

LOL
Hope your new engine is better than your new one anyway mate.
Cheers,
David