You are talking about John Parker. His web site is:

http://www.v-performance.com/about.html

I think the progressive wound springs would be a better bet than the just plain stiffer IPD springs. Bilstein shocks and IPD sway bar kit would round that out nicely (reinforce the rear sway bar mounts in the floor pan sooner rather than later, however).

Your car might have the later style rear suspension - in which case a disc-brake 1800e axle would bolt right on. Get the OD transmission as well and replace the puny u-joint drive shaft with a beefier 1800e unit. This may not be such a weak spot on a 67 122 - my old 63 122 had tiny u-joints that bolted onto yokes with little u-bolts and the B20E wore them out quickly. I finally fixed it with a 142e OD tranny, driveshaft (with later style support bearing mount) and rear axle.

John Mc