LS1 Conversion
Thread Starter
Safety Car
Joined: Mar 2009
Posts: 3,558
Likes: 4
From: Oakland California
Nope, I'm running a manual Z bar.
Look up 168 vs 153 tooth bell housings, you can tell by the shape of the starter bulge. You'll need the 621 style 168 tooth housing to clear the LS flywheel and pressure plate. I swapped my 4 speed for a Richmond 6 speed. I bought a 621 BBC bell housing from Keisler. It had the extra LS bolt hole machined, but that's not necesary.
You can find the PN for the throwout bearing and pilot bushing in my posts the LS swap sticky.
Look up 168 vs 153 tooth bell housings, you can tell by the shape of the starter bulge. You'll need the 621 style 168 tooth housing to clear the LS flywheel and pressure plate. I swapped my 4 speed for a Richmond 6 speed. I bought a 621 BBC bell housing from Keisler. It had the extra LS bolt hole machined, but that's not necesary.
You can find the PN for the throwout bearing and pilot bushing in my posts the LS swap sticky.
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
The "621" is the casting number for the BBC 168 tooth bell housing. It has a circular "lump" where the starter fits. The 153 tooth bell housing will have more of a squared off shoulder. Look on ebay for examples.
Either that or buy one from Keisler that has the extra LS bolt hole. They're very well made/machined and come with an adjustable throwout arm stud.
168 tooth for 11" clutch:
http://cgi.ebay.com/ebaymotors/Chevy...lenotsupported
153 tooth for 10.4" clutch:
http://cgi.ebay.com/ebaymotors/Bell-...lenotsupported
Either that or buy one from Keisler that has the extra LS bolt hole. They're very well made/machined and come with an adjustable throwout arm stud.
168 tooth for 11" clutch:
http://cgi.ebay.com/ebaymotors/Chevy...lenotsupported
153 tooth for 10.4" clutch:
http://cgi.ebay.com/ebaymotors/Bell-...lenotsupported
Last edited by Garys 68; Jul 1, 2009 at 09:15 AM.
