too tall

hi this is my first post hear i have been wanting to do a gen 3 swap and now i have a truck to start with my first question is im wanting to mate the gen 3 to the sm465 thats in the truck what all will i need dose the gen 3 use the same bell as the old 350 and my second question is what headers do i use? sorry about the lack of knowing what im doing hear lol im a ford man hear are some starter pics

and a pic of the old clutch disc

ls6firebird

i dont have anything usefull to say haha, but id like to see the progress with the truck. im gonna be swappin a lq4 or lq9 into my lifted 90 silverado. ive been wonderin if there were a lotta people swappin these into older 4x4s. gl with the project