The donor vehicle that has the 318 in it looks great, what’s happening with it? Do you know how many miles the 318 in it has? Opinions will vary on wether or not you should try to get it to run as is, but I would probably opt to just long enough to break the gum out of the rings with some Berryman B-12 down its throat and running a compression test afterwards. The engine may not need taken all the way down for a full rebuild. If it’s a hydraulic roller 318, it’s easy enough to add a set of magnum heads with pushrods for oiling and an aftermarket carburetor intake and distributor. Most hydraulic roller 318s I’ve seen already have lifters with the pushrod cups drilled for oiling through the pushrods.