cant decide what to do..help
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Supreme Member
Joined: Nov 2001
Posts: 2,743
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From: heartland
Car: 89rs (previous 2.8)
Engine: 406
Transmission: 700r4 (for now)
cant decide what to do..help
i just did the 2.8 to 350 swap... 
Love it for sure. The problem is this...The 700r4 I put in isnt what it was supposed to be...As i'm sure you all relize The engine swap cost alot $$$$$. Well I'm not a rich man 
I have a newly rebuilt th350 sitting in my garage..my question is this....how much trouble is it to convert to the th350. I know summit has a conversion kit for 90.00, says it will bolt up, using the same driveline and trans mounts...anyone used this kit? Or....would I be better off rebuilding the 700r4....performance is a must. Thanks for your time, any .02 would be welcomed.
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89 Camaro RS +
350 bored 30 over
summit shorty headers
600 edelbrock
edelbrock performer manifold
forged crank & pistons
double hump heads
steel cam
piece of s_ _ _ _ 700r4 jy transmission
previous 2.8 v6
Love it for sure. The problem is this...The 700r4 I put in isnt what it was supposed to be...As i'm sure you all relize The engine swap cost alot $$$$$. Well I'm not a rich man I have a newly rebuilt th350 sitting in my garage..my question is this....how much trouble is it to convert to the th350. I know summit has a conversion kit for 90.00, says it will bolt up, using the same driveline and trans mounts...anyone used this kit? Or....would I be better off rebuilding the 700r4....performance is a must. Thanks for your time, any .02 would be welcomed.
------------------
89 Camaro RS +
350 bored 30 over
summit shorty headers
600 edelbrock
edelbrock performer manifold
forged crank & pistons
double hump heads
steel cam
piece of s_ _ _ _ 700r4 jy transmission
previous 2.8 v6
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Sell the TH350 and use the money to finance the TH700 rebuild (if that's really what it needs). Although it might end up costing more to do that than it would to get it back on the road doing the TH350, in the long run the TH700 is the better street tranny.
If you want to get an idea what it would be like having the TH350, go for about a week without using overdrive - no higher than D all week. Also put an extra 300 pounds in the car to simulate what the lower number 1st gear will be like with the 3-speed tranny. If you think you can live with that, do the TH350 swap.
You'll need a different crossmember and driveshaft in addition to the "conversion" kit.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
If you want to get an idea what it would be like having the TH350, go for about a week without using overdrive - no higher than D all week. Also put an extra 300 pounds in the car to simulate what the lower number 1st gear will be like with the 3-speed tranny. If you think you can live with that, do the TH350 swap.
You'll need a different crossmember and driveshaft in addition to the "conversion" kit.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
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