Gary.  I mentioned John Mummert because you've already been working with him in getting your pistons and rods.  Ted Eaton, one of our Forum moderators, is also someone I would HIGHLY recommend your talking with about camshaft selection.  While many of our members have built individual engines, JM and Ted have done many more professionally for different applications and uses from street to competition.

Ted seems to turn to Isky for many of the builds he has spoken about, many times ordering custom grinds that are not catalog offering to accomplish getting what he wants for different applications in the way of intake or exhaust duration (sometimes split), lift, overlap, and LCA.  

Ted can be reached at:
Ted Eaton (254)857-3339
ted@eatonbalancing.com
1060 Wolf Creek Rd., Lorena Tx, 76655

JM can be reached at:
John Mummert (619) 596-0312
John has an email address, but several have indicated that calling and talking with John is THE way to go...
IF John doesn't answer, you'll likely be talking with his son Geoff who has his share of expertise, too.

Hope this helps.  


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

As a follow-up to Miker's input, my recollection is that Modern DriveLine did advertise a .8 overdrive offering for the T-5z at one time.  It was depicted as serving those participating in road course events.

I THINK that MDL began operation in CA in 1998, but has since moved circa 2006-2007 to Caldwell, Idaho which is near Boise, Idaho.


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Gary.  I referenced Ted Eaton in a previous entry in this thread.  You may be interested to look at the listing of articles he has posted on his Eaton Balancing web site that are y-block Ford related. 

Click the link below . . .
http://www.eatonbalancing.com/blog/category/y-block/

An article in that listing that you might find of particular interest reports on Ted's rebuilding of a 292 block for street and highway use in a '56 Ford passenger car.  For that particular application Ted ordered an Isky cam with a configuration not in the Isky catalog.  The engine uses a 3.820 bore (312 + .020), stock 292 crank, un-ported 113 heads, and the 303 displacement puts out over 300 HP.  Again, this engine was purpose built for street and highway use.

Click the link below
http://www.eatonbalancing.com/blog/2015/05/01/unported-iron-heads-can-still-make-over-a-hp-to-the-cubic-inch/ 


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York