heater will not get warm

[Terrybneal]

I just put a 350 in a 85 Blazer. The heater will not get hot. The engine is running about 180, but very little heat is coming out of the vents.When I switch the control from hot to cold,the fan seems to be forced through tne vent harder. I am thinking I have the vacuum hooked up wrong to the vacuum motors.What is the best way to run vacuum to the motors?

[spacecadet]

There is only one plastic line going into the dash for the heater control vac*. The way I beleive its supposed to be hooked up is from the manifold. thru a one way valve into a T connector. One line going to a vac um ball and the other going into the dash. The ball holds vac um when the engine isn\'t producing the required vac um to operate is accesorys.

[racer1182]

i wouldn\'t have a clue but when i had the 4 cyl in my truck the heater didn\'t work for beans............when i put the 327 in there it worked so good that I couldn\'t even turn it on anymore it got so hot. and i had my 2.5 radiator in there until summer came.when summer came i could not keep it cool to save my life