I never lost to a 4.6 GT in my Lt1 camaro. (it was an auto too!

) If you wanna be pulling the mid 90s fbodies, it'll take AT LEAST Gears, intake, exhaust, !badass driver mod, and a lucky day, or some nitrous.
What are stock 4.6 times? 1/8 and 1/4? Lt1s are supposed to run mid to upper 13's in stock form, and thats still plenty to beat on a modular engine. Im pretty sure the Tq curves are a lot different too, the lt1 reaching its max hp and tq sooner and at lower RPMs than the mod. engine.