Quote:
Originally Posted by Shortbed 68
Any useful info welcomed on ls swap in a 68 short bed.
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As noted, there's an LS swap section here:
http://67-72chevytrucks.com/vboard/f...play.php?f=206
But I can give some quick answers to your questions.
Radiator: I used the stock one, with 2005 Silverado hoses.
Trans cooler: The one in the stock radiator works unless you're doing something crazy (or have reason to suspect it's full of crud).
wiring: Lots of options here. You can run an aftermarket standalone ECU (that's what I did), run a stock ECU with a professionally made engine swap harness, or a stock ECU and mod the harness yourself, depending on your needs, skills, and budget.
Drivetrain: If you want an automatic, a good option is to get the engine with its matching 4L60E or 4L80E transmission as a set. You'll have to modify the driveshaft to make it fit. You can get just about any transmission that fits behind a small block Chevy to go behind an LSx if you want.
Fuel system with stock in cab tank: Yes, it's doable; I stuck a Walbro 255 lph fuel pump intended for a Mazda Miata in my stock tank. If I did things again, though, I'd use a tank mounted under the bed as I still sometimes have a gas smell in the cab and I don't like that. Plus, an electric in tank pump is pretty loud - a pump under the cab would probably have been a better choice, but I wanted to see just how easy a low buck in tank fuel pump conversion would be.