53 chevy on 95 s10 frame cooling issues

[dsraven]

the 327 v8 had a different cooling system than an LS engine has. the LS thermostat controls coolant RETURN from rad rather than OUTFLOW from engine.

where does the steam line from the heads go? through throttle body and then where? it is hard to make out in the pic. possibly a few more pics or details would help us help you figure it out?

is the rad cap the highest point in the cooling system?

what have you got for a surge tank set up? is it a true surge tank or an overflow tank or does the overflow hose from the rad cap dump onto the ground? is it possible to install a true surge tank near the rad somewhere and still keep it under the hood? possibly a surge tank from a p/u or corvette that came with LS that has a rad cap on it-just keep the rad cap on the rad as well to operate as a plug? possibly a custom tank like the pirate 4x4 article? it is an integral part of the system to de-aerate the coolant. possibly your problem with overheating?

maybe read the entire article and see how it can be applied to your truck, before it is too late and something overheats too far. I know, nobody likes to read all that stuff or redo anything that has already had a whack of thought put into it, but if you continue to overheat you may be redoing the engine and THEN fixing the overheating issue. remember, they don't work the same as the old small block engines. plus you are running a downflow rad, which isn't optimal for an LS engine.

keep us posted