Help me decide please!

[BOSS]

OK here it goes---First off i sold the 69 so i will be needing a new name soon....lol.I have bought a 72 2x4 custom lwb with a 350 sbc that is on it's last ride,A 67 shortfleet no motor,And am going to look at a super K20 tomorrow that has no motor either.Now what i have is the 350 out of the 72,400 sbc (2 bolt) was running when we changed it but the rod was starting to knock,And a 84 350 crossfire out of a 84 vette that would need a rebuild.Now what i need help with is i have about $1200 to spend on fixing one of the engines now,which one would you suggest?Or would you recommend buying a new 350 with the warranty?I am thinking the crossfire in the 67 (because i have the whole vette and was thinking about putting everything i can off of it into the truck),rebuild the 350 for the 2x4 and the 400 in the 4x4.The 2x4 would be a daily driver,and i would like the 4x4 to use for towing.Any advice would be nice and i will try to get pics when i can,and be thinking on a new name for me......lol.Thanx guys and gals!!