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Reload this Page SB Chevy 400 / T-5 ???

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Old 06-17-2002, 11:38 PM   #1
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Join Date: May 2002
Location: Rochester Hills, MI
Posts: 278
Car: '91 Firebird
Engine: 408 SBC
Transmission: T5

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SB Chevy 400 / T-5 ???
I’m planning on dropping a SB Chevy 400 into my ’91 Firebird this coming weekend. Currently, it is powered by a 305 TBI / T-5 combo. Due to limited funds, I’ll be keeping the stock T-5 for the time being. Though I would like to replace the clutch at this time with something more performance oriented. Unfortunately, the 400 came with a flexplate for an automatic transmission. I’m trying to make a list of parts that I will need to perform this swap.

I understand that the Chevy 400 requires a special flywheel, since it is externally balanced – that is about the extent of my knowledge – please help me out by answering some of the following questions:

All of the flywheels that I’ve found for the 400 are the 168-tooth variety and are made to mate with a 10.5” or 11” pressure plate. I remember reading something about the larger flexplate not fitting the stock bellhousing of the T-5 – is this true?

&

If the stock bellhousing is too small, will replacing it with an aftermarket piece (Lakewood for example) solve the problem? Will the aftermarket bolt right in with no clearance problems?

Thanks
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Old 06-18-2002, 07:51 AM   #2
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Location: Loveland, OH, US
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Get a 83-85 305 Camaro/Firebird flywheel, and have it "unbalanced" at your local balancing shop. That's what I did.
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Old 06-18-2002, 06:32 PM   #3
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Join Date: May 2002
Location: Rochester Hills, MI
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Car: '91 Firebird
Engine: 408 SBC
Transmission: T5

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Well, I just ordered a Lakewood Blowproof Bellhousing - a little pricey, but it'll give me some piece of mind, knowing that if I grenade my clutch, I shouldn't get injured in the process. I also ordered a Hayes Flywheel & Clutch Kit. I hope all this stuff arrives by Saturday!
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Old 06-18-2002, 06:51 PM   #4
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Try this...proven combo every Friday & Saturday nite @ your local Super late madel race motor with external balancing....
Sorry for the long links, hope they work.
Good luck...
For harder launches w/ sticky tires, you may want to go with your heavier stock F/W

http://www.speedwaymotors.com/produc...T0GXDBFPA825XC

http://www.speedwaymotors.com/produc...T0GXDBFPA825XC
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Old 06-18-2002, 09:51 PM   #5
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Join Date: May 2002
Location: Rochester Hills, MI
Posts: 278
Car: '91 Firebird
Engine: 408 SBC
Transmission: T5

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Thanks MorgRS - You just saved me over $200 dollars. I called up Jeg's and canceled my order. Instead of buying a Chevy 400 flywheel, I'll just use that balancing plate (your 2nd link) on my stock flywheel.

Thanks again
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Reload this Page SB Chevy 400 / T-5 ???
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