RE: V-8 & original gauges
Of course ~ you'll need some threaded adapters (maybe) to connect the oil pressure gauge line and hopefully , it'll spent the rest of it's life pinned on the high end...
I dunno if there's a hot water port in the back of the block on a 350 , or maybe one in the left head but that's what you'll need =
a threaded port to screw the temp. gauge bulb into or a bushing then the bulb . it is very simple all in all ,you'll need to find a FLAPS with a good Weatherhead cabinet ot maybe just crawl the scrapyards for a while to find the bushings you need....
-Nate