what is everything i need to know about putting a 5.3 in a 73 chevy truck. im going to use the turbo 350 tranny. what do i need to to do to make the stock wiring harness work? witch engine mounts do i need? fuel pump? thanks for any help
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what is everything i need to know about putting a 5.3 in a 73 chevy truck. im going to use the turbo 350 tranny. what do i need to to do to make the stock wiring harness work? witch engine mounts do i need? fuel pump? thanks for any help
Use the search function in the forum, it will help to answer a lot of your questions :)
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!
I got a stand alone harness off of ebay from seller named Techrods and also found a guy on there that does the reprogramming for the computer. The harness hooks up really easy. The motor will run by itself just by hooking up 4 wires, switched 12V, ground, starter wire and fuel pump. I used motor mounts from Advance Adapters and you'll need to get there fly wheel kit also b/c of the crankshaft backspacing between the old small block and the newer GEN IV motors. I used a summit inline fuel mounted it right on the rail by the tank and it works perfect. It depends on which intake you use you may need to find an inline regulator also. The LS truck motors from 99-2002 had the regulator built into the fuel rail, so you won't need the inline one.
>> Here is the link for the wiring harness I used eBay Motors: 1999-02 LS1 Fuel Injection Wiring Harness (item 200323448556 end time Mar-29-09 20:09:33 PDT)
>> Here is the link for the computer programming eBay Motors: Vortec LS1 LSX LT1 performance computer tuning PCM (item 250394187069 end time Mar-29-09 09:56:32 PDT)
No offense but if i were you i wouldnt buy anything that may need rework or replacement from ebay. Especially a ECU that may need to be tuned more then once to get it the way you want it.
Basically you get what you pay for when it comes to this stuff. That stuff in those links is a bit cheaper but i would rather have the peace of mind and reliability then a few more bucks when it comes to my truck.
Do yourself a favor and go with a reputable performance shop like NelsonPerformace or one like them. Most of these guys will go way out of their way to make you happy.
Good luck with your build!
I'm not seeing any 73+ motor mounts from them. I've heard that s&p makes some, but I'm not finding any on thier site. Welcome to Street & PeformanceQuote:
Originally Posted by JHART
I dont blame you on the S&P site that site is a mess ...lol
I will do some research for you and get back here.
I just got off the phone with ECE. He said the motor mounts for they have for 63-72 will work. The fram and cross member are the same so they will do fine.
call them up 559.291.1611 real cool guys.
what oil pan has a better clearance?
best ground clearance is the fbody/camaro. Vette could be better but the bat wing design makes it tough to put in anything else.
do i need anything else or does it just bolt up? oil pick up or something?