The new guy has questions

[samuellg1977]

Hi everyone. I am brand new to the site. Awesome trucks and man, the customs are simply stunning. Ok, first, i want to tell everyone that I am not a mechanic - I am a parts replacer. I picked up this 63 pickup about two months ago and the motor gave up on me. I yanked it out and put a 350/700R4 in. It runs great, but it overheats on me. I put a 160 degree t-stat in, new-er fan sroud and no change... boils over sittin in traffic. The water pump is pushing, it gets pressure, no smoke, no oil in the water, no water in the oil. The temp guage reads 160-170. The cap is a 15lbs cap... My dad is a big wrench-snatching old school gear-head and he gave me all the advice he could think of and it still isn't doin too good. As long as i am cruisin open-road, it is fine, but when i get into stop-n-go traffic, it gets hot. I can't afford to put it in the shop since the truck and motor swap drained my savings. Is there anything i am missing or could try to keep my cool? The side-view is the BEFORE, the corner view is the AFTER.