I've got an 87 r10 the 305s life recently ended so I figured I'd swap in a 5.3 and 4l60e I got from an 04 Silverado. I've got some questions as far as fuel lines not trying to spend too much on something that won't get looked at often. It has the single fuel line, so could I run the stock hard lines up almost to the engine bay run the reg/filter and a shorter amount of expensive efi hose or ??? Setup is dbw so any major headaches with that? The truck was factory ac but I don't plan on running ac does that clear up what engine mounts I can use. Will the truck manifolds clear my frame. Can I stab the engine and trans with the front clip on or is the whole swap easier with it off. Truck already has a 700 in it so not too worried about the drive shaft. Is there a fitting for the stock temp sensor in the truck to work on the 5.3 or vise versa. I don't have the whole fuse block but I think the harness has the c2 or whatever. Will my radiator work its huge so I don't think cooling will be a problem but I keep seeing something about a steam vent or some thing. And will trans cooler fittings from a 700 work on the 4l60e

 

Thinking about this myself- any progress?

 

Welcome. Make a post in the engine thread section, or make a build thread, youll get more help over there.