To perfectly honest, the pre-93 units just aren't up to modern day standards.
They were acceptable in the mid to late eighties but today you have to out brake the lightweight car traveling in front of you and its fitted with ABS.
I have found the pre-93 units to be a BIG let down in the wet and on long downhill mountain braking runs the brake fade is a worry.
I eventually settled for the Brembo 65mm centres. The braking pads have a large surface area and the adapters from Quality Parts on line fit snugly on the pre-93 mounts.
The only change I made was to paint the Brembo's silver to match the original cosmetics.
I'll post pics soon.
Here's the promised pic.