i dont remember for sure what i put on it first. i think they were listed for a 1bbl vert. it would have taken an extra engine to drop it down to the right height. the shocks were topped out.
the SBC camaro guys use the 6308s too. i dont know for sure that they'd work with the Pontiac8, but I can add quite a bit of weight to my front bumper before it moves much.