Mmm, I don't think it would fit a 455 pontiac. BigBlock. this is a Small block intake. But I can take any carbed intake and covert it over to EFI also like I did my Vic Jr.
http://www.cecoatings.com/images/Car...cJrConversion/
As for puting in on a SBC you can use a stock TPI style computer and harness.
or get a painless harness for a tpi setup. or go with a aftermarket ecm like a holly 950 commander, a megasquirt , etc.. depends on what direction you want to go. etc..
feel reee to e-mail me when/if you desire to do something. I can walk you thru doing it yourself. I can sell you a DIY kit., etc..
chris @ cecoatings dot com or
FSTFBDY @ gmail dot com