Re: inlet & heads
your first block is us cast, aussie delivered. your list of creds is correct. tour second block with no apparent enging number on front will be us cast and delivered. look on rear of block(bellhousing face) on passenger side(lhs) between the dowell and the top bolt there will be a us engine number. it is the same block as your first one just us delivered. dual plane spread bore manifolds came out on 302, 351 and 351 4v.(large port) check manifold port to head port size for match. auto xb gt and xc onward had 2v port with 4 bl carb and 302/3514v stamped on id sticker in engine family section. on these engines, 4v just meant 4 venturi carb not (large port) 4v heads. the carb and manifold you have will work great on a stock or mild 302. cheers.