Jadedbird

iTrader: (27)

What radiator did you use? Stock with ls1 fans?
And what about the fuel? Did you use a 5.3 truck sending unit?

ijimmy

stock mechanical truck fan and radiator , for fuel line i ran 3/8 hard line to engine bay , and short piece of an line to fuel raill

Jadedbird

iTrader: (27)

Alright cool. Now do I have to mess with the harness any?
Im trying to get the truck on the road asap and cheap as possible.
No heater no ac no body work Just turn signals brake lights and headlights.
I bought a 72 frame. modifying the horns and sticking my 64 body on it. 5 lug power steering and disk brakes.
Does the 5.3 power steering work or will I need to use the 72 power steering ?

76larkman

lot of guys are going blazer injected tank between frame rails in back. cheap & great way to get out of cab. also giving you baffled tank just put rite pump in.

Scottydog

What year fuel injected blazer tank? I also have a 64 get fleets idea and am doing a 5.3 4l60e swap

Scottydog

Sorry auto correct. 64 gmc fleetside

76larkman

im not sure. I saw it on here with several builds. Probably 87 & newer but I would do measure what your space is. I know trimming on rail lip a bit was required to drop in back there. I would see if 95 & newer is plastic? as they did have rust issue with cover on bottom of them holding water. Plus 95 & newer should have same size hole for like silverado pump for correct pressure.

76larkman

post some pics guys. see what you have. where you located?

76larkman

the 5.3 pump works just change out valve on back with old style then no line thread issues at all. may have to tweak metal part of line but no big deal.

Scottydog

I will try to get some pics later today. Located in EastMoline IL.

76larkman

your not far from me. Im by cedar rapids Ia. I have friends with these trucks but no ls power in them.

truckdoug

iTrader: (25)

I used an aluminum radiator intended for a ls swapped '69 camaro
it gave me passenger side inlet and outlet which made hoses super easy.

I would use the radiator again, but I'd get the manual trans model without the cooler inside and use a stand-alone trans cooler and fan unit mounted under the cab.

I also used a '69 camaro gas tank for an ls-swap (spectra?) and i don't recommend it. The fuel level sender required a resistor and still isnt very accurate. It's hard to fill (flip down license plate) and the tank's slosh bucket uncovers and the truck fuel starves any time i go around a freeway on ramp at less than half a tank. Also the pump that it came with was a turd and died immediately. I also lost my trailer hitch putting it there, and I really didn't realize how useful it was.

76larkman

some of the later GM work trucks 1 ton & 1 ton hd has a secondary tank assembly that accepts later Gm pump assemblies. might be worth checking into as they be cheap and fit in frame rails.