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Old 03-31-2003, 06:45 PM
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Angry 200R4 pros and cons

I have a 70 Nova with a TH350, and stock 10 bolt rearend. I plan to drop in a 350-400hp 400 small block this summer and add 3.55 gears. My dillema is that I can't decide if I should rebuild the TH350 or get a 2004R. I want a "weekend racer" that I can drive frequently during the summer and run on the freeway quite a bit. I've read as many posts on this subject as I could find, called bowtie overdrives, and talked to some other tranny builders here in boise. Alot of people say the 200 is a great tranny if I have the money, but there are also the few negatives. My stepfather has been building chevy's for years and he thinks the 200 is a waste of money and isn't going to provide enough benefits for the buck, ie gas mileage, lower RPM's, strength. I would like to know if anyone has convincing information to not make the swap or can present common problems with even a well built 200. I am planning on ordering the bowtie overdrives level 2 tranny, and want to make sure it's worth it. I respect my stepfather's opinion greatly, but fear he is behind the times concerning improvements. Any input is greatly appreciated, thanks.

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Old 03-31-2003, 08:31 PM
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The 200's came in the GN Turbo Buicks. They can be made tough.

They do reduce RPM's.

I do not believe in them for HotRods. I prefer Turbo 400's. Tough and almost unbreakable. I may be like your step-father and be behind the times.


Look at the 32's in the upper left side......
The Red 32 has a 200R. The Black 32 Roadster has a Turbo 400. Both are 350 Chevrolet powered. Both are ZZ series crate motors. The Red 32 has a ZZ4 and the Black 32 currently has a ZZZ. The Red 32 has a 3.89 rear and the Black 32 has a 3.00.

The Red 32 turns less RPM's on the Interstate at 70 MPH but the Black 32 gets 1-2 MPH better fuel mileage. The Black 32 is quicker than the Red 32. The Red one spins from too much gear and then it does not rev enough at 70 MPH to get the engine in cruise RPM range.


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