Engle HEV 3945AS Camshaft

ch1ll said
Call Engle and tell him that you don’t have a cam card for that particular cam. He will know what it is. What you are looking for is the intake lobe center line. That is how you install it. He will be able to give you more information on that cam if you ask.

The DV YouTube video talks about ICL, which is correct for your displacement and intake valve size and how this may not match your cam card ICL. There are about 4-5 cam videos on David Vizard’s YouTube channel, they are not hard to find.

DV is more talking about LSA which is a different matter to ICL. DV's formula indicates the starting point for the LSA for best torque across the RPM range. This uses the displacement of one cylinder and the effective valve seat diameter (intake valve diameter × 0.91). ICL is a matter of whether the cam is installed straight up, advanced or retarded.
David disagrees with those that arbitraily assign an IVC point. Use DV's formula for inline valve heads to get the LSA correct and then adjust duration to determine overlap which controls idle quality. For high CR and fast off the seat valve action the LSA is adjusted a bit. DV has a newer video out that shows the differences between LSA's of 104°, 106°, 108°, 110° and 112°, on one engine. As his video demonstrates, chosing a cam with the LSA a degree or two tight will lose a bit of torque, but chosing the LSA a degree or two wider loses more torque. And this is across the power band.
I bought a hydraulic cam from Engle to install in a 351W. Short duration for mileage. I figured I wanted a 112° LSA because that is what all the "smart guys" were saying. The cam tech sent it ground on a 109° LSA and told me it would have better torque. It ran real nicely. When I sold the car, a friend talked the buyer into rebuilding it to install in a 1948 Mercury 1/2ton. I drilled a 2 × 4 to put the lifters in to keep in order and kept the cam. I will install it in my 289 using LS 1.9" intake valves. Formula says to use 107° LSA but with 11.5:1 CR and 1.72:1 Scorpion rockers, the ajustment should be close to 108° to 108.5°. Close, and I save on the costs of a cam and lifters.