engine choice suggestions

[dill68]

here is my problem. i am building a 67 camaro and i cant decide which motor to put in it. choices are i bought a 540 with turbo 400 combo with 200 miles on it has alum heads or a few years ago i built a 02 trans am with ls1 6 sp. ls1 has alot of head work, larger cam, jesel shaft rockers and twin intercooled procharger setup.made 6 something at rear wheels. didnt like car so i drove it about 500 miles and stuck it in a building. dont mind parting the ws6 to get the running gear also has moser 12 bolt. which do you guys think wold be the way to go. thanks