How Far Can GT-40 Heads Go

[67GTA390]

I recently acquired a 90LX 5.0 5spd, and i was wondering about doing a head swap off a 93-97 explorer (correct me if im wrong) to get the Original Iron GT-40 heads. I know that they need to be milled a bit (to about 10:1), and if i were to port them and then put a ported Cobra intake on with a 70mm TB, BBK fenderwell Cold Air, 75mm MAF and a B-303 cam or another similar one from Anderson, what kinda times could i expect? The only things i have done to the car already is put a Pro 5.0 Shifter, subrame connectors, Lakewood adjustable upper and lowers, rear seat delete and Cowl Hood. How far could this combination be pushed if i put some ET Streets and practice my driving a lot? Thanks for any help you guys can give


Steve

PS Tublar Front K-Member is on its way also with lakewood Struts and Coilovers