im looking to lift my firebird so it isnt so close to the ground,i am putting a 455 in it and i know it will make the car drop so i need something to hold this motor and keep my car off the ground

new stiff springs should keep the front end off the ground.
I'd recommend moog 5664's for the front, to help with the added weight. That's the stiffest factory spring available to fit in our front perches. They have about the same spring rate as some of the aftermarket lowering springs - but without the lowering effect.

Depending on the 455 it might be lighter than a 350. Buicks was IIRC.

thanks man i know im getting this motor out of an old buick im not too great on motors i do mostly body work maybe you can help me by telling me what that IIRC thing is lol.Also i was thinking about putting air shocks on the back so i can jack it up or lower it you know

IIRC - If I remember correctly.
FWIW - For what it's worth
BC - because
LMAO - laughing my a** off

There's a crash course right there.

ok, 455 buick, good choice. Do it up good now! Don't just drop in a smogger POS. Some work on that (not a ton of work), and it'll be a torque monster (due to cubes, not due to "buick".)
That's actually a lighter engine than an SBC.

I'd still recommend moog 5664's in the front, and cc635, cargo coils in the back. Air shocks if you have $$ to burn, but personally i'd rather put the money to something better, like custom made headers, remote oil filter adapter, intake manifold etc.