I have a KA24E hybrid engine for sale. This was an engine I had built for my 510 but ran out of funds. NAPZ bottom end (utilizes all 510 components for an easier swap) with a SOHC KA head.
Built engine w. JE pistons 10:1 compression with a +0.02 overbore, aggressive camshaft, fully assembled.
Engine was setup to use twin Mikuni carbs mounted on a Nismo KA Sidedraft Intake.
Lightened flywheel with Roadster clutch setup.
Idealy suited for a 510 chassis but will work in the S13 nicely as well for anyone looking for a setup similiar ( I know most of you guys prefer EFI Turbo 
Also have header, starter, alternator, Bellhousing to adapt KA trans, Aluminum rad / fan.
For more info shoot me an email pharoah1016@hotmail.com
Seann