350 chev installation requirements

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DARREN LILLY
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Joined: Sun Feb 10, 2019 4:14 pm

350 chev installation requirements

Post by DARREN LILLY » Thu Nov 07, 2019 2:06 pm

Hi I installed a sniper fi on the 360 but broke down 15 minutes after getting it back from the mechanic, I want to now remove the 360 & put a 350 chev in to replace it. What do I need to fit the 350 in a 79 chief it has a th400 gearbox, will it need engine mounts, exhuast, wiring, radiator, conversion plates or anything else. Looking at a 395hp vortec ready to go anyone suggest something better. Thanks
1979 chief 360 auto QT Australia

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tgreese
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Re: 350 chev installation requirements

Post by tgreese » Thu Nov 07, 2019 2:26 pm

Have you searched? It's been covered a lot here and on IFSJA. Plenty of step-by-step accounts. You are asking strangers to write an instruction book for you.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
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Dual Everything: '15 FCA Jeep Cherokee KL Trailhawk, ECO Green

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Stuka
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Re: 350 chev installation requirements

Post by Stuka » Thu Nov 07, 2019 2:58 pm

Well, my first question is, why did it break down? Fixing a break down is going to be a whole lot easier, and cheaper than an engine swap. Even if the AMC engine threw a rod, it will be cheaper to fix than swapping to something else.

To swap in a Vortec, you are going to need at a minimum...

1. Engine Mounts
2. Transmission adapter from AMC to Vortec, provided you want to keep the TH400/QT. And note a QT may not live long behind a 400hp engine.
A. Otherwise both a transmission and a passenger drop t-case.
B. if above is true, then add in front and rear drive shafts.
3. Exhaust
4. Wiring
5. Possibly a radiator depending on what you have now
6. Custom tuned ECU
7. Fuel system, unless the one for your sniper can be made to work
8. A ton of little nickel and dime items.

And this is just what comes to mind off the top of my head. In short, a lot of work. If you are having a shop do this, its going to be expensive.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Lifted and stuff
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ


Topic author
DARREN LILLY
Posts: 37
Joined: Sun Feb 10, 2019 4:14 pm

Re: 350 chev installation requirements

Post by DARREN LILLY » Fri Nov 08, 2019 4:08 pm

Thanks stuka, amc's arent common here & hard to get parts for & usually have to order them in so usually around a week or more for delivery. Chev most parts can be bought off the shelf here & are much cheaper. I know of a similiar jeep that had a chev conversion that has driven all over the country for more than 30,000ks & hasnt missed a beat & hes still travelling now so cant ask him what the process was, thats what I want. I dont mind spending the money as long as it gets the result I want that is a good reliable engine. Spent $30,000 on this jeep so far but alls Ive got is a very nice car to look at but doesnt go good. I will use the 360 in my cj10 as it needs a new engine so not wasted & it doesnt travell too far from home so reliability not as critical. Complete crate engine cost I looked at is $9000 starting prices are around $5,000. Couple of items you mention that I didnt think of so glad I asked as I went through a heap of links that were highlighted for me to have a look at & also the novak site write up. Why it broke down I dont know but to find out will cost more money to be thrown in the pit.
1979 chief 360 auto QT Australia

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