Join Date: Jan 2005
Location: San Juan Capistrano
I haven't done a detailed stress analysis on this question, but my gut says "no, two 8 mm bolts threaded into aluminum won't support the mass and vibration loads of an A/C compressor".
A slightly better approach would be to use a Spica front cover, which has four, 8 mm threaded holes designed to secure the Spica pump. You could fabricate a bracket for the A/C compressor that mounted on those four bolts. But I can't guarantee whether that would be strong enough.
A proven approach would be to use the factory bracket that mounts to the two, large holes at the top/front of the cylinder head. That's where Alfa mounted the compressor on the early 115's with A/C. Admittedly, moving the compressor to the upper left, instead of lower right of the engine would entail a lot of re-plumbing.
San Juan Capistrano, CA
'63 Guilia spider
'65 Guilia Sprint GT
Last edited by Alfajay; 02-18-2018 at 08:00 AM.