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So I just found that my 455 is hooked up to a turbo gm 400 tranny and I have a few questions.

1. First off I am looking for a Speedo cable that matches this set up, I was told that the Speedo cable had to be spacific to the motor/tranny cambo. If this is true what would you recommend?

2. The torque converter in this thing is aftermarket with a higher stall speed then needed. I'm wondering what stall speed is good with this set up. I am currently looking for a stock stall speed converter and found that 1800rpms was what probly came on the car any idea were I can source on from.

Any info is a great help. If any of my info is wrong please correct me I am new to carborated v8's
 

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"...The torque converter in this thing is aftermarket with a higher stall speed then needed. I'm wondering what stall speed is good with this set up. I am currently looking for a stock stall speed converter and found that 1800rpms was what probly came on the car any idea were I can source on from.

Any info is a great help. If any of my info is wrong please correct me I am new to carborated v8's

I think most Pontiac TH400's came with 13" converters. And most all stock 12 & 13" converters stall less than 2000 rpm.

You can buy rebuilt stock converters online, or from any auto trans rebuild shop. Most should be less than $100. There are also lots of aftermarket 12" low stall converters, for sale on Ebay and other places, for just over $100.

http://www.ebay.com/itm/TH400-GM3-Torque-Converter-Chevy-remanufactured-with-1-year-warranty-/231724065069?hash=item35f3d4a12d:g:Mw8AAOSwstxU2X6M&vxp=mtr

http://www.ebay.com/itm/Allstar-Performance-2000-2200-RPM-12-in-TH350-400-Torque-Converter-P-N-26908/401002030246?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D34002%26meid%3Dccc18ff6ea86408ca324b45c577a24b8%26pid%3D100011%26rk%3D1%26rkt%3D10%26sd%3D321580301086&rmvSB=true

http://www.ebay.com/itm/ACC-46000-12-Turbo-400-Stock-Stall-Torque-Converter-Chevy-GM-TH400-Transmission/390690053563?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D34002%26meid%3D3b9a80e2e4d244abae591196cb872561%26pid%3D100005%26rk%3D1%26rkt%3D3%26sd%3D281801941755
 
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