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1985 GMC 4x4 LS Motor Swap, tons of pics!
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05-23-2013, 01:31 PM
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bohmankid
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Join Date: Nov 2012
Location: Salt Lake City, UT
Posts: 520
Re: 1985 GMC 4x4 LS Motor Swap, tons of pics!
For anybody who has done an ls swap: how are you hooking up your vacuum lines? I tee'd everything (trans, heater controls, booster) into the back manifold port (the one that goes to the booster) and I think I'm not getting enough vacuum to everything. brakes are spongy, trans shifts awkwardly under a load, and heater controls are slow. Should I break open a different port on the manifold and try to get vacuum from somewhere else?
Anyway, the truck runs great besides those quirks. I took it up the mountain yesterday evening and took some cool pictures.
The last time I tried taking the truck up these steep hills, i had to floor it up the hills, and the truck overheated and spewed antifreeze everywhere. That was with the old motor and that's about the same time I decided to do a swap... This 5.3 conquered those hills, I didn't even have to use the gas, just torqued up the mountain.
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My 1985 GMC 4x4 LS swap build thread
R.I.P.
My 1978 Big Ten, Big Block build thread
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