I just swaped my 350 with a 383 running supercharged SuperRam in 95 chevy truck it has 160 T-stat and at idle it will get to 214 when it is 80* F outside.
if I turn the A/C on it keeps going up I am using a new larger radiator that is used in the 454 trucks with 2 high flow 17" electric fans, where befor the swap I just had one p.o.s fan but it held 210 with a/c on and 110* F outside everything is the same just differant block??? it has all been flushed the T-stat is working and there is much more heat coming off of the radiator usualy it is some stupid little thing but this engine just makes a lot of heat? any ideas?
Thanks

 

I've got the same problem with my 383. Runs way too friggin hot. I think mine may have something to do with my timing; since I can't figure that out on my own I'm going to have to take it somewhere and make sure it's correct. You may want to look there as well.

S.

 

I think my timing is good but I may be wrong can timing being off slightly cause it to overheat at idle? I will mess with it and see if I can get it better let me know if you solve your problem
Thanks

 

With my timing off on my 305 I would constantly be at 210, and that's in my 305. With timing tuned to the engine I constantly stay at 160... its really nice