Join Date: Jan 2008
Location: Melbourne, Australia
Alfa 75 Brembo calipers do bolt straight up to early 105 uprights. You'll need to trim the splash guards as the Brembos are a little larger than the ATE calipers. The hard brake line on the caliper side of the flexible line will need to be modified because the inlet is in a different location to the ATE calipers.
If you take the 10mm spacer out of the Brembos, they should suit a stock 12mm thick 105 rotor, but you may need to fit a later model 105 (eg 2lt) rotor as I beleive the earlier rotors are a smaller diameter, and the Brembo pads may hang over the edge of the smaller rotors.
I'm not sure, but I think you'd probably need to use Alfa 75 pads instead of stock ATE pads in the Brembo calipers.
I fitted 22mm thick ventilated rotors (ie same thickness as Alfa 75 rotors) as part of my conversion to Brembo calipers, so I left the spacers in place. There are a couple of sources for these custom rotors here in Oz, but there may be suppliers in the UK who stock these as well.
One other consideration... you may need to fit shims between the caliper and the upright mounting holes to get the Brembo pads/pistons properly centred either side of the rotor.
There's not much I can tell you about the servos because I've swapped out the stock single circuit system on my GT1300 Junior for an Alfetta hanging pedal box and torsion rod assembly (see below photo). This gives me a readily available twin circuit master cylinder, with servo boosting, on the exhaust side of the engine bay.
Now: 1968 Alfa Romeo GT 1300 Junior - Restoration Completed 2016
Previously: 1974 Alfasud TI - first car
Last edited by njh1964; 02-04-2012 at 10:13 PM.