"...seen a few kits..."
I usually avoid kits (price, choices) as too expensive and somebody else has pre-selected the components.
I come HERE (well, 'sites') as the guys can tell me what Y/M/M swap ins that up-grade. I just have delivery by 1 of the big box auto stores (autoZone, advance, etc). On other hand a kit is all pre-assembled (often w/hardware too).
I do not have a 289 so will B of lill help. I would say get rid of any round ford pump. They are not durable. I use a 'canned ham' the saginaw (gm) pump. Neighbor hada Rolls "Come over'n C." Asked to open the hood I saw 1 of these. "Y?" said. Him: "U can't improve on the best." The bracktry might B hard (CJphony? LMR?). I have plenty spare for my 1st gen bronk but still hada cut/weld. Belt? easy. Hoses - local sno plow sales co (some NAPAs). Later model falcon, stang/fox body for the ster gear.