We use a relocation adapter rather than a sandwich plate. A sandwich plate is designed to allow the use of the OE oil filter on the back side with two ports coming off at a 90 degree angle. For our race motors (and any performance motor) the OE size oil filter is woefully inadequite. Also, making a 90 degree bend in that short of a distance creates to much resistance to flow. Therefore, we use the adapter shown in the pic below. (BTW, the material wrapped around it is a precaution for any possible leaks. It is a flame retardant absorption material.) It has straight through flow and we use a remote filter mount to allow use of a much larger filter. You can get a remote filter housing with addition ports for your sensors.
In regards to oil cooling, yes we do run a cooler and it is an oil to water cooler or a "heat exchanger". We did not go with an air to oil cooler because with the large intercooler out front there is no more "clean" air to make an air to oil cooler effective and we did not want to decrease the effectiveness of the intercooler.
I hear you on running out of room in the engine bay!!
Thanks for your great questions!(2thumbs)
Tom