I cut to of the three throttle/mixture/prop firewall passthroughs. Started with a #40 then stepped up with a unibit until the hole was large enough to use my el cheapo Harbor Freight hole cutters. One inch is perfect. Just for reference the hole cutters sliced through the firewall, insulation and ss overcoat with ease and without tearing the ss overcoat.
Installed the steel passthroughs after drilling all the holes. I will resize the holes when I am sure of the cable diameter.
I needed to get the 90 degree oil filter adaptor and aux alternator done before hanging the engine while access is excellent. Removed the existing oil filter adaptor, left pmag and vernatherm. Installed aux alternator and torqued all nuts with a special thin Snap-on tool bought earlier. Then removed the single bolt from the case using the two nuts back to back method and installed the 90 degree oil filter adaptor. I opted to not install the 1.4 inch thick spacer which came with the oil filter adaptor. The oil filter is easily accessible. My only concern is will the oil filter touch or come too close to the engine mount when installed. I guess we will see. Used permatex on all gaskets. I still need to torque the vernatherm and safety wire it, the oil temperature probe and oil filter. We are almost ready to hang this bad boy. Oh, and I checked; I can get the 45 degree 8D fitting on for the oil cooler return line which is just above the left pmag while the oil filter adapter is in place.