This is about my 1993 SW1's journey from an automatic Single Overhead Cam to a manual Twin Cam. The car was purchased in June of 2003 with the plans of doing a swap sometime in the future, but when it wouldn't pass the strict California emissions test in order to transfer ownership, it was decided to do the swap as soon as possible. Starting then I began gathering all the parts needed and getting the machine work done to do the swap. On December 18th 2003 and after 8 hours of work the engine was in and running.

For further in depth information to do a Twin Cam swap visit:
Different Racing Motor Swap Tech Article

Parts purchased at Pick-N-Pull or used off of a 1995 SL2 I purchased on eBay for $99 for a parts car:
-Full 1993 LLO Twin Cam Engine
-1992 SC wiring harness
-Shift cables
-Shifter
-Shift boot
-Throttle cable
-Fuel pump
-Clutch pedal
-Brake Pedal
-Flywheel
-1993 TwinCam PCM
-1991/1992 stock tubular header & downpipe
-fuel injectors
-clutch master/slave cylinder
-throttle body
-Manual MP3 transmission

Work done by machine shop:
-Checked block
-Bored cylinders 0.5mm over
-Checked rods
-Checked crank (determined that it was too close to being out of spec)
-Resurfaced flywheel
-Hot tanked engine block

New parts purchased
-Crank
-Hastings rings
-Silvolite pistons
-Clevite bearings
-All gaskets
-Rear main seal
-Oil Pump
-Timing Chain Kit
-Valve stem seals
-Clutch
-Pressure plate
-Muffler
-Resonator
-Catalytic converter

Other things that have been done to the car are:
-Swapped tan to grey/charcoal interior
-SL2 front and rear seats
-Leather steering wheel
-Chrome shift knob
-Welded differential pin in place
-Pioneer head unit
-Kicker 12" Subs
-MTX amplifier
-Removed automatic octapus arm seatbelts and installed fixed 1995+ style.
-Installed stock power lock system using all stock parts
-Replaced SW1 bumpers with painted bumpers from a 1993 SL2
-Replaced SW1 door handles with color matched handles
-Shortened shifter
-15" Stock Teardrop wheels
-Sprint Extreme springs
-Stock foglights
-Full custom exhaust (36" resonator, highflow catalytic converter, flowmaster muffler
-Gibson exhaust tip
-Painted cam cover & intake manifold
-SpringTech Struts
-SL2 rear swar and brackets welded into place
-18 x 7.5 ADR Rydox Wheels
-215-35-18 Nankang NS-2 Tires

Here is a picture of the SW1 just after starting the swap. The hood is off to ease the removal and installation of the engine. The fender and front fascia are still loosly attached because the fender had to be removed to install the TwinCam PCM to engine wiring harness. You can also see here the SL2 15" tear drop wheels and SL2 front and rear fascias.

The old SingleCam engine. It was very clean, but didnt run to well. Compression was Ok in cylinders one, three and four, but very low in cylinder number two. Upon disassembly of the engine it was noticed the the head was slightly warped and the number two piston had bad rings. But on a positive note, the main bearings and the rod bearings were in susprisingly good shape for having 235,000 miles on them.

The engine is out and ready to retire. Next we removed the accessories and sensors and transplanted them to the new engine.

The empty engine bay, ready for the Twin Cam engine.

Another shot of the empty engine bay. The manual transmission shift cables are installed along with the DOHC wiring harness and throttle cable.