Big Cap HEI Distributor in Small Block 68 Camaro

[dtep]

Has anyone successfully used a "big cap" HEI distributor in a small block 68 Camaro without modifying the firewall?  If so, what brand and model did you use?  Did a 14 inch air cleaner fit without modifications?  The car I am rebuilding came with a small cap HEI distributor and one of those big honkin' yellow Accel coils mounted on the firewall.  I'm looking for something more subtle and would prefer not to have the coil visible at all.  TIA.

[JST69Z28]

I recently installed a Summit Ready to Run vacuum advance small cap distributor in my 69 Z28 because the large cap HEI didn't fit, and I didn't want to bend the firewall.  Even with that the 2 front spark plug wires (8.5 mm) were a tight fit with the air cleaner on but still worked.  I ordered their coil, (also had a big one previously) not too big and works great.  Photo attached.