Your stock harness in the 73 will not work. Are you talking baou the stock 5.3 harness? You can do it with that but its allot of hacking. I would recamend sending it in to somehwere like speartech. I sent mine in and had them build me a harness for my 72 out of a stock 01 harness. Saved me about 300 bucks.
You will need the ECU tuned and hacked to remove o2 stuff and the VAT and some other stuff. Call nelson performance and tell them what your doing and they will hook you up.
ECE makes some really good mounts. Welcome To Early Classic Enterprises they also have headers and other misc stuff you might want.
Bets thing i can tell you is have some patience as your going to run into little quirks here and there.
I have seen some guys use the stock tank and pump for the fuel system but i wouldnt recamend it. I would find a good aftermarket baffled tank and newer pump/sending unit if you can afford it.
Are you going with the throttle by wire or by cable?
Is your 5.3 out of a truck? The accesory drive placement can be a fitting issue if its not out of a truck.
check out this site 67-72chevytrucks.com i found a TON of swap info there and allot of the guys helped me out with my questions.
Good luck!
'01 Silverado ECSB - 5.3L, K&N, BONE STOCK(For now) 7.5'' Fabtech Lift on 20'' KMC XD's wrapped in 33'' Micky's
'72 C-10 SBC - 5.3L, 4L60E, MSD, K&N - still a work in progress.
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Originally Posted by JHART
