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I also went with the cam snout adaptor route.
Learned the hard way that the stock cam sucks.

It's barely tips the valves off their seat. The stock Magnum camshaft is 0.39/0.40" lift.

Decent torque. It's make more torque at idle than some engines do at 2000rpm. Here is my truck in 1st gear.

http://www.youtube.com/watch?v=nCmRdB1isoY&feature=player_embedded

Problem is there is nobody home after 4000rpm.
I recommend a cam swap.

The B&M flex plate is the easiest solution to the balance issue.

http://www.bmracing.com/PRODUCTS/Chrysler-SFI-29-1-approved/SFI-Flexplate-Chrysler_7



I'd use the hughes adapter for the cam, and get yours reground at http://www.deltacam.com/ or http://www.bulletcams.com/

I'd swap to GM3100 valve springs & retainers, and for lobes, I'd go with something like the HR262/300 lobe
on bullets master lobe list (http://www.bulletcams.com/Masters/HRlobes.htm) I'd probably do it as a single pattern cam.

1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)