Big Problems with New 408 +PICS

Well, I got more specs... alot more specs...

The oil concern with the lifter has been resolved, the shop who built my shortblock forgot to re-install the rear oil gallery plug... Yet another one to add to my list of SpeedOMotive f*ckups...

I was hoping someone could give me a more precise idea as to what caused this ridge on my number 7 cylinder. Too tight of piston ring? Rich condition caused fuel to wash oil off cylinder?

Or is this not far from normal? :scratch:

I measured my cylinder #7 bore, which feels obviously like it has a larger ridge by hand. I included cylinder #3 since it’s what all the other cylinders on that side looks like.

Engine info: 408 from 360 block, about 200 miles, 2 quarter mile runs and one dyno pull.

Cylinder 7 Bore Measurements:
*Note this is oddball, much larger ridge by hand*

Left to Right bore:
4.026 (at the ridge)
4.034 (just below ridge)
4.035 (middle of cylinder)
4.030 (bottom, against piston)

Top to Bottom:
4.028 (ridge)
4.033
4.035
4.035

Cylinder 3 Bore Measurements:
*Note, this is what all the others look like*

Left to Right bore:
4.027 (ridge)
4.026
4.029
4.031
4.029

Top to Bottom:
4.024 (ridge)
4.031
4.035
4.030
4.031

Also, here are the compression test numbers:
Cylinder, Dry, Wet
1, 175, 210 ***most compression and biggest difference dry/wet***
3, 160, 175
5, 145, 175
7, 145, 155 ***the ridge***
2, 165
4, 155, 165
6, 160
8, 160, 170

Thanks :icescrea: