08-30-2010, 07:31 PM
|
#2
|
|
Senior Enthusiast
Join Date: Feb 2007
Location: Spokane Valley, WA
Posts: 8,356
|
Re: 63 Chevy 4speed
It's probably an SM420 and yes it is strong. Here is a link to more information:
http://www.novak-adapt.com/knowledge/sm420.htm
|
|
|