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Old 06-14-2018, 10:58 AM   #23
custom1970's Avatar
Join Date: Jan 2011
Location: Stuart, Florida
Posts: 452
Re: '89 K1500 engine replacement help

Originally Posted by ChevyTech View Post
You're welcome!
If you use the electric pump that is in the tank the fuel pressure will be so high the carburetor won't hold it back unless you use a fuel pressure regulator.

You do not have to drop the tank. I know of several people that used a mechanical pump and it was able to draw fuel through the pump in the tank without the tank pump having power to it.
We are using a fuel regulator. That would be great if we didn't have to drop tank. I know someone else mentioned that at high speed/volume that the old pump would restrict the flow.... good to here that it shouldn't be a problem

How would you suggest the best way to deactivate the existing pump? It don't see a fuse and hate to just cut the wire...

1970 CST LB Fleetside, 402 BB, PS, PB,AC
1968 Firebird 400 conv.
1965 Chris Craft 17' wood ski boat (SN #0001)
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