Thoughts on swapping a slant 6 with a 383

383Scampman said
Here's the rub . motor mounts , center link , transmission , rear axle , radiator , drive shaft , throttle linkage , k d linkage , you don't have to delete the heater just the fan , shift linkage . Just for starters . The difference between a stock 383 and an upgraded one , price wise, is negative . Oh yeah, oil pan swap . Manifolds are pricey . C-body manifolds are cheaper but the left side dumps right in the steering . Try-Y is a good compromise . Go for it .

this above is 100% correct.
Yes you will need a V8 centerlink if going from /6.
you will need the correct oil pan as well, which are getting harder to find if want oem.
/6 suspension & brakes, both front & rear will need an upgrade, a big block in any config drops a good bit more lbs into the front end and a bit more, via other beefed up components such as the rear axle. Guys have in the past used /6 stuff for the track to get weight transfer, but they suck on the street.
The entire Exhaust system will need reworked/replaced.
There is of course several different ways to approach and achieve this. where there is a will (and the wallet), there is a way. Question is, is having a bigblock worth it to you and is it right for this car. most of my later bigblock projects started with a totally stripped out donor shell, non-power steering/brakes for good reason.
Your 360 build, if done instead, will require many of these things as well. ie: trans, rear end, exhaust, cooling system, etc. so although 'cheaper' its still requires considerable parts/system replacement/upgrades to do it correctly, its just a little more straight forward and you have plenty of oem stuff that pretty much falls right in.