Quinn,
if you get the block for nothing your on to a good start. You say it comes with all the parts. If these are serviceable that is even better. As a guide, my side oiler has cost me around $8000 in parts so far (not including block), and its not finished yet !
My big concern would be your last point - the proximity of the exhausts to the rear clip. You can both wrap the pipes and put heat reflective matting on the clip, so maybe this isn't really a problem.
You can run the big block with a wide winged sump rather than a dry sump, but space is limited and it will most likely need to be specially fabricated (An Aviaid cobra one might work if your lucky).
I suspect using a thick core alloy radiator will do wonders for the cooling, as long as you also use a swirl pot to help seperate the air. Oil cooling would be a great benefit too.
Finally, you could use a ZF box. Sure they broke in the original cars, but this was under race conditions. I was told Panteras with big blocks have no problems, and the ZF expert in the UK told me the same. It seems these might be harder to find than a 930 box at present though.
Finally, finally
, you need to speak to the chosen chassis supplier so they can advise on fitting a big block, engine mounts, increased weight, and any clearance issues (remember a big block sump is 24 inches long, then add the front pulley clearance...).
Hope that helps.
if you get the block for nothing your on to a good start. You say it comes with all the parts. If these are serviceable that is even better. As a guide, my side oiler has cost me around $8000 in parts so far (not including block), and its not finished yet !
My big concern would be your last point - the proximity of the exhausts to the rear clip. You can both wrap the pipes and put heat reflective matting on the clip, so maybe this isn't really a problem.
You can run the big block with a wide winged sump rather than a dry sump, but space is limited and it will most likely need to be specially fabricated (An Aviaid cobra one might work if your lucky).
I suspect using a thick core alloy radiator will do wonders for the cooling, as long as you also use a swirl pot to help seperate the air. Oil cooling would be a great benefit too.
Finally, you could use a ZF box. Sure they broke in the original cars, but this was under race conditions. I was told Panteras with big blocks have no problems, and the ZF expert in the UK told me the same. It seems these might be harder to find than a 930 box at present though.
Finally, finally

Hope that helps.