D16z6 125hp, 106 tq or
D16y8 127hp, 107tq
You should be able to find a
complete swap for around $600-$1000.
Since most everyone is DOHC crazy, find someone that is swapping and buy their SOHC. I did and I got a Z6 out of a '95 Del Sol (115,XXX verified 'cause I helped pull the motor) for $600. Included was tranny, dist, complete intake, complete header, spark plug wires, ECU, axles (which had just been replaced!!), power steering pump, alternator, and all motor mounts. Basically everything attached to the engine from the factory.
You'll need a P28 ECU and then either the wiring harness or add a wire for the VTEC. You can also add I/H/E for some modest HP gains from stock. Internal mods are readily available for both.
For encouragement for sticking with a SOHC go
here.
Good Luck!
