M-1.

Sounds like your combo is fairly similar to mine. I don't have it installed in my '69 Barracuda yet, but guys here say low 11's to high 10's shouldn't be a problem.

If you are street driving it, I'd go with a smaller carb for more response and better manners. I have a new 950 HP for mine, but probably would've done fine with an 850. 1050 sounds like a little much, IMHO.

My combo:

440 block, .040 over, 4.15 crank
Hughes HEH4650BL Hydraulic cam, 108 lobe separation, specs are at 1.6:1 :
intake .606 lift at 246 duration
exhaust .614 lift at 250 duration
Edelbrock Performer RPM heads, 84 cc
Harland Sharp 1.6:1 rollers
Ross 99903 pistons, 11:1 at zero deck
Ported Mopar M-1 intake
Holley 950 HP
MSD 6AL, MSD Pro-Billet distributor