Oh, what a can of worms I've opened with all of these parts from different engines.... trying to get a decently balanced and blueprinted engine.

It's a good thing I didn't immediately cut the decks from the initial measurements. The differences didn't seem right, so I took the crankshaft to the machine shop, referenced the #1 throw at "0" and found these measurements:

#1 = 0.0000"
#2 = 0.0005" (+)
#3 = 0.0010" (-)
#4 = 0.0015" (+)
#5 = 0.0005" (+)
#6 = 0.0000"

So, my original corner measurements were useless and there was no way for me to determine how to deck the block without getting more information.

Those crankshaft measurements are not real good for someone trying to build a race engine, but I'll settle for a half <img src="/forums/images/graemlins/butwiggle.gif" alt="" /> balanced engine - don't really want to regrind the crankshaft - the rod journals could be ground .010" undersize to true up the stroke differences, but I first wanted to check the rods to see what they looked like.

Came home and put every rod/piston in the #1 hole to see what squirrels lurked there - found this mess as measured proud of the deck (no particular identification of rods #s):

.0160"
.0165"
.0150"
.0160"
.0155"
.0150"

At this point, I started a swap-fest - put the longest rod/piston on the shortest crank throw, shortest rod/piston on the longest crank throw - and on an on and 'round and 'round until I was satisfied that the closest combination of stroke variance and rod/piston length variance looked like this:

#1 = 0.0010"
#3 = 0.0005"
#5 = 0.0010"

#2 = 0.0005"
#4 = 0.0015"
#6 = 0.0010"

And, the measurement of the installed pistons (no rings) above the bore were as follows:

#1 = 0.0150"
#3 = 0.0150"
#5 = 0.0140"

#2 = 0.0130"
#4 = 0.0145"
#6 = 0.0140"

Using the actual amount of piston protrusion expressed as a negative number and deducting the (+) variance totals from the measured clearance then provided a deck height relative to the originally referenced #1 crankshaft journal as follows:

#1 = - 0.0140"
#3 = - 0.0145"
#5 = - 0.0130"

#2 = - 0.0125"
#4 = - 0.0130"
#6 = - 0.0130"

Both decks appear by eye and straightedge to reflect the dimensional variations as the numbers indicate and I CAN see with a straightedge and flashlight the .0015" dip on the passenger side.... BUT, before I cut this deck, I want to check and recheck the math to make sure it's correct.

Surely there's an easier way to do this....... <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

IF the above is correct, I'll still have to mill 4 pistons between .0005" and .0015" if I want all of the pistons to run the same head clearance. <img src="/forums/images/graemlins/scared.gif" alt="" />

What a way to run a railroad......... <img src="/forums/images/graemlins/lol.gif" alt="" />

Frank