I ran the DCR calculator from www.kb-silvolite.com only to get a result that differed from the advice I had received on the boards previously, which put it in question. So I checked another calculator on www.jeepstrokers.com/calculator/ and got much closer to what I have been told here. 9.58:1 static compression on a stock stroke 440 with an Intake valve closing 61 degrees ABDC is 7.83:1 DCR. Wallace racing closely confirmed this. A far cry from the www.kb-silvolite.com calculated DCR of 6.90:1.

Looks like the difference is that KB has you add 15 degrees to the Intake closing ABDC value.

So, what calculator do you guys use and trust?