most of them are one bolt!

you should look at one of these
http://www.summitracing.com/parts/SUM-G1056/

You would need one solid lifter too and a solid pushrod is nice to run up to the dial indicator
one of these is real nice
http://chucker54.stores.yahoo.net/crtusowidewh.html
summit
http://www.summitracing.com/parts/CCA-4799/
in use nice the degree whee goes right in it I did put a couple extra set screws in as you use the small keyway and the set screw is hard to get at