Why does nobody make a rocker over 1.6 for a la small block shaft mount??, I see they make bigger ones for magnums and w-stuff but why not for the factory style shaft mount?

The only way to get the true answer is to call the manufactures and ask them
Let us know what you find out please so we can share that in the future

Because you can't really make the rocker any longer and you can only move the adjuster so close to the shaft before the adjuster is too close to the shaft.

IIRC Harland Sharp used to have a 1.65 rocker. Not sure if they still do.

Also IIRC T&D would do a 1.7 if you used the small diameter shaft.

But that would mean relying on my memory. I wouldn't do that.

Harlan Sharp has made special rockers for me with no issues and very quick too. Give them a call and ask for their mopar specialist

My T&D's are 1.7 and I don't think it would be an issue getting 1.8's.

Are they are Chrysler diameter shafts or on the smaller shafts?

My Yella Terra's are shaft mounted 1.65's. These are rollers but they now make bushed units too.

YT6300: SB Chrys, Adjust, 1.65, Modular YT shafts/full bearings (shown in picture)
YT6011: SB Chrys, Adjust, 1.5, Uses factory shafts, Bronze bushed
YT6764: SB Chrys, Adjust, 1.65, Uses factory shafts, Bronze bushed (new)

HARLAN SHARP MAKES CUSTOM ONES I HAD THEM MADE

The Magnun rocker arms are a 1.6 to start with so looking for a 1.7 is easy but I have not noticed a 1.8 advertised for the Magnum head.