It can be done, but is a bit of a pain ... as more than one person who has done it has posted!
Much better would be the WebCam '20/21' grind which is slightly hotter, and usable with CIS or DME fuel injection systems.
www.webcaminc.com
------------------
Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler