If you add more spark advance, as mentioned, and go a step looser on torque converter, it will be ok.

Worst case, a dog from the traffic light but very fun mid-range and on up. Much more fun than the cam you have now.

I'd run it with the a smallest 4 barrel available (600 cfm being the largest), new spark curve, headers, good dual exhaust and same converter to try it out. Change converter later.

Don't over think this, just do it.