I did a front similar to Ben's with a machined bung thru the wishbone and forged perches, but left the taper on the perches which seated in the weld bung. I also installed a panard bar. This chassis has over 20,000 miles of hard driving on it so far with no problems. I'm getting ready to do a chassis with the spring behind the axle and I have been studying the way Walden Speed Shop does his and he does a lip of heavy material over the axle to limit upward movement of the axle in case the spring or perch breaks, it also mounts the radiator. He also uses a panard bar. Looks like a wise addition?