Stock 904 how much hp can it handle

My stock 904 (means all stock including VB) with the factory stock converter has been taking "occasional" abuse from a mild 360 in a A-body running 13's (now very low 13's) for the past few years with 2.45 gears and now 2.94 gears. Weight of vehicle, gears, and tire size makes a big difference on the life of the tranny as well. Same with DS.