thanks jeff can always count on you my friend:beers::I built the same deal for a buddy Used the 280H in his 396 it is .030 over and strip dominator with 800 carb and 3" exhaust through borla's. The engine has 2.19-1.88 valves open chamber Ported oval GM heads from 1969.
It pulls hard to 6700 then valve float.. recently in the cold it would pull lickity split to 7000 rpm.. which is closer to about right. The springs on this one are comp set at 121 psi seat.. I feel I need to up that a little to keep it out of valve float. Those large valves are heavy.
We have 11:1 compression on that one and 210 PSI cranking pressure. Runs excellent on 91 octane and 38 total timing.
It is in a 4200 lb 1966 chevy truck with 3500 stall and 308 gears currently.
Yea 308 It did run 13.7 in the 1/4 in that deal.
I like tight lobe centers if you need the early closing intake. But going to 108 from your 110 you may not notice much at all really.
But crank it to 105 or 106 LSA you will notice.
I have a solid flat tappet on a 105 LSA for my 433" One day it will go together.
Will not be MPG friendly though The wider LSA does improve MPG.