Ok, I really appreciate your help so far. This has been tremendously confusing (see Bought a 428 fot a 390)
K. Wilson came over and did two tests on the block. The drill bit test and a Sonic Measurement. Keith will find this amuzing, but yes we did read the instructions for the sonic unit.
Don't tell our wives.
Here are the drill bit results:
(cylinder spacing-drill bit)/2
1-2 (.508-.25)/2 = .129
2-3 (.502-.265)/2 = .118
3-4 (.507-.25)/2 = .128
5-6 (.508-.235)/2 = .136
6-7 (.506-.235)/2 = .135
7-8 (.507-.25)/2 = .128
Check my math.
Next sonic test:
ioutside inside
1 .138 .161
2 .184 .146
3 .178 .136
4 .178 .152
8 .123 .193
7 .139 .193
6 .136 .171
5 .142 .176
Outside refers to the "thrust" side.
Even though it is stamped 352 in the water jacket, how can this be? It has definitely been honed if not bored too. All cylinders measure 4.13 plus or minus (mostly minus) a few thousandths. A standard 352 is 4.0 implying that the boring would have required 130 thousandths meaning that the original wall thickness would have been between 0.2 -0.24 give or take.
What do you all think? Can it run as a 428 standard bore? (no more boring)
Mike
Mike