Jim,
Neal is right. That is the smallest distributor that will work. I believe the Mallory Unilite is small enough too.
If you want a little more room then between the bulkhead and distributor then do what I discribe in this thread,
http://www.gt40s.com/ubbthreads/show...0/page/0#64158
Doing this modification is easy and it gives about an inch more clearance.
Hersh [img]/ubbthreads/images/graemlins/smile.gif[/img]