The 2 best mated to a 4.0L for a swap are the Ford 86 and newer 5.0L yellow top injectors, or...A bosch 703 found in the 90's Dodge neon 4cyl. Black top.
Both are a plug and play injector on the 4.0L and both have a 4 hole nozzle for the better atomization pattern in the spray.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...