How to put 20v into KE70?

Many websites have publish many good articles about it, therefore please feel free to refer to them. The following two is my favorite: -

Change the ECU to standalone, those that can run Direct Ignition System (DIS), using Coil Over Plugs (COPs) and program the stand-alone to read the existing distributor as a crank trigger sensor and a cam trigger sensor at the same time. You'll need a 4 channel igniter for the 4 COPs.

Since the distributor will be used as a crank cam sensor only, the cover for plug cables is not required and may be removed permanently. Make a new cover to prevent water from going in. This would approximately reduce 2 inches or more and just about clear the firewall.

Simple stand-alone may not run DIS but twinspark instead, these are not sufficient, although technically you could wire the individual COP to spark double cylinders. This is highly NOT advisable as these coils are small and will suffer from saturation due to lack of charging time.

Remove the 20v head from the block and perform the drilling operation as described by Toy Mod's PDF.

Use the 4A-G older water pumps which routes the water into the block first at cylinder 1, then coming out of the head at cylinder 1 also.

If do again, how? VERSION_2

If do again, how? (Update 2014 - I'd probably won't do this)
Braking System (Update 2014 - I'd probably won't do this)
Tires & Rims (Update 2014 - I'd probably won't do this)
TITAN's Suspension
Engine by Power Zone
Engine to 20v MAP (Update 2014 - I'd probably won't do this)
What other items needed? (Update 2014 - I'd probably won't do this)
How to put 20v into KE70? (Update 2014 - I'd probably won't do this)
Tips (Update 2014 - I'd probably won't do this)
Re-route Water Direction for 4A-GE 20v Engine from FF Chassis to FR Chassis KE70 or AE86 (Update 2014 - I'd probably won't do this)

If do again, how? VERSION_2