Just to let you know, be careful. Alumium and Steel React to each other if they are not properly coated.

IE: Zinced, or stainless

 

alas... if you want something done right, you gotta do it yourself, right?... right. so... spoke w/ Larry (owner of Endyn, aka The Old One)... for all you slackers out there, i did your homework for you today :

first off, he suggests laying the block down on its side and do one side at a time.

For d16s...

1) exhaust side measurements: 1.50" down from the deck, centered on axis with each cylinder
Intake side measurements: top pin at 0.90" and bottom pin at 2.10" down from the deck, centered on axis with each cylinder

2) carbide grind approximately 1 square inch of the surface around where the hole locations will be, to rough it up enough to get rid of any oxidation on the aluminum and for the aluminum epoxy to adhere better

3) use a 5/16" drill bit and a 3/8 - 16 tap size

4) thoroughly clean the pins, holes, and roughed surfaces with acetone and allow to dry

5) Place a little aluminum epoxy on the threads of the pins as well as the holes and work the epoxy in by screwing the pin in and out a couple times

6) screw in pins to cylinder walls to 2 pounds and cover (both front and back) with enough epoxy to cover all of the exposed pin and the adjacent roughed block wall

7) let fully cure to time instructed, as per the epoxy used

bore and hone

 

Good. A nOOB doing his homework!