overheating issue

[shammesfah]

1989 350 motor with new risers ellbows flappers and exhuast is over heating over 1500 rpm The flow from outdrive pump seems to be good
the engine has low compression (maybe from the overheating)
I am not running a thermostat right now

Is there a method to see where the problem lies

One question I have is can the block clog up and if so how do you repair

What changes are needed to use an automotive long block besides the freeze plugs and head gasket

 

[Bt Doctur]

Re: overheating issue

compression test
leakdown test
Do you have good clean flow at 2500rpm?