Alvin, your friend should be fine, with a 32 degree neck, he’ll still have about 3.4 trail left. There are calculators out there where you can calculate the front-end geometry. My last two bikes have been customs with raked necks and those calculators became my friend.
The Front-end geometry of a bike is not to be taken lightly. (IMHO).
“Raked cups will Increase your trail… Raked trees will Decrease your trail”
As Trooper stated, his Sportster handled squirley. I don’t know what degree tree he had, but at 3degree’s his trail was probably only a little over 2”. and at 5 degree’s, it would be flat out dangerous.
I believe correct trail should be about 4-5 inches. IMO.
Good luck and be careful out there, it’s a dangerous world we live in.http://www.rbracing-rsr.com/advchoppercalc.html