bbc blower motor help

[blown69rat]

Here's the thing....

start the car. run for about 5-10 minutes and it's already pushing antifreeze into the overflow and that's with the pump OFF. Opinions on cause??

other 2 problems.....
fouling plugs. Pulled the plugs last night and they are BLACK, no tan. runs very rich, blowing slightly black smoke out tails.

fuel pressure is fluctuation up and down. At idle, sits about 6 1/2 (needs to be upped, I know) but the problem is on the gauge in the car, when you hit the gas, it will drop to around 4 lbs.

Here is what I was told, I would like some SERIOUS input.
Antifreeze-could be a problem with the cap(but did the same thing with 2 different caps), could be a blown or seeping head gasket, could be somewhat normal

Carbs-dirt in carbs, out of sync, not matched

fuel pressure-who knows!?!?!? wiring, filter, whatever

In order to help me figure this out, if you need more info, let me know. Thanks guys!!

[Jim Filipowski]

Well a bad gasket could cause all your problems. Have you done a leak down test and or a compression test. The coolant is fouling out the plugs and they just get black from not firing.

[FinishFirst]

If the motor is a BB 10 minutes of idling with not enough timing will get very hot.
Dirt in the needle and seat will run you rich, as for water in cylinder white smoke
would be your problem.
I run a 8-71 with 2 demon 850 on 454, street/stip 9.90 140 mph and until your carbs are set up its hard on plugs.