a non vtec dizy will work on a vtec head, the ears on the dizzy have to be modified so the dizzy shaft sits strait.

i was a running an obdo ls dizzy on a obd1 d16z6 in my crx
my buddy's crx is runninga d16z6 with a obdo crx si dizzy for the last 3 years, also ran it on a ls/v for a year with out a single problem