Sounds to me like you have enough motor/trans/rear for mid-12s easily. Me, I'd move the battery to the R/R of the trunk, put subframe connectors in it, do the 'glass ft bumper, and remove weight up front: splash shields, brackets, and wiper stuff, radio & heater if it's a dedicated drag car.
Then see what it does and what needs to be addressed. Likely a Caltracs setup & some loose ft shocks. Of course heads & more cam will pick up a bunch, but first I'd want to make sure the car applies the power you have and can handle an upgrade.