Any details about how it ended up at 7.4:1?
What heads are on it?
What sized headers were used?

Now that they have the ultra low buck part covered......I think there’s a nice opportunity here to show how a little old school “hot rodding” can work out.

If the first step up from stock “required” the use of an off-the-shelf cam....... I think the XE275HL would have made a little more power, especially since it looks like moving the cam from 101 to 107 was worth 10hp, and the fact that the motor is peaking so early, the fast rate of the XE/HL cam shouldn’t keep the motor from reaching its natural peak(as opposed to its valvetrain rpm limit peak).

I’d try a “not off the shelf” cam, mill the heads, and about 2hrs worth of bowl blending.