Re: Yes another low compression super budget 454
For minimal cost but a bunch of work.
Being it probably has peanut ports as you assume.
I'd yank the heads off and pocket port the bowels, while changing the head gaskets to steel shims.( if it doesn't have them already.)
Just don't nick the seats and a quick hand lap after and you would be good to go. (Provided the valve job was in decent shape to begin with.)
It would take better advantage of the larger cam your intending.
I would go a little farther with the heads myself, but I can do valve jobs for me for free.
65 Pontiac Lemans 468 BBC, t400, 4.10 12bolt
Best 1/4 mile. 11.43 @ 118 mph