So I did a compression test, procedures are followed. I removed the valve covers, UVCH, and of course unplugged all of the injectors. I cranked the engine over until I saw that the psi's had peaked. Let me know if I did this wrong!
Cyl 1 - 420 psi
Cyl 2 - 390 psi
Cyl 3 - 420 psi
Cyl 4 - 410 psi
Cyl 5 - 400 psi
Cyl 6 - 395 psi
Cyl 7 - 400 psi
Cyl 8 - 350 psi

Let me know how these numbers stack up. Also if I did this correct or not. Thank ya!!

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Bump??

 

I remember seeing 375 as good and your average was 398. With about a %5 avg sound like a good running engine.

 

I wasn't sure if a 70 pound difference was too much.

 

that's a 70 pound difference, which, from your highest, is 1/16th, which is about 16.8%.

general rule is that your lowest compression figure should be 75% of your highest. and yours is about 84% if my math stacks up. should be fine.