Callen, sorry for the delay, here are some pictures i hope they help. On the sandwich adapter remove the bypass valve and drill out to 25/64", the other 11 holes are 15/64" equal spaced. Chamfer all holes for oil flow. The 12 holes have an area of .585 square inch, the extension is .220 square inch. This shows the adapter flows 2.65 times more than the filter extension hence no restriction. Make sure the extension nut is tight as it will back out every time you unscrew the old oil filter, i retorque app. 20 ft/lbs. On another picture it shows a "T" with a pressure switch (oil pressure switch for fuel pump cut off on injected motors) and the pressure sending unit (big can) for a pressure gauge. The fittings are anodized and prevented the sender and switch from going to ground, add a ground wire to both then to frame. Next picture the cold ram air is two 3" diameter 45 degree rubber tubes from a late 80's Mustang 4 cylinder intake system, add a 3" X 1" long exhaust pipe with straps and make a offset. Remove the snorkel and save, install offset and your good to go. Look at the lower part of the picture you'll see orange light, it's from a light placed in the filter box so you can see the intake behind the left headlight. Another picture shows the cold air into the air box and the pre-oiler i installed, just fits with less than 1/8" clearance but it works. This is a 3 qt. total system with 1 1/2 qt. oil and 1 1/2 qt. air chamber. Thru a electronic timer i get 4 seconds of oil at 20 psi before starting engine. This allows for hot, cold, thin, thick oil, restart in one minute or one year and the engine is started wet. Rovers have a bad dry start, thats why i have a new 4.6 engine. The pressure gauge picture shows the gauge way forward because the body **** under the gauge. It's a VDO gauge 1 1/2" diameter i like the 0-80 better than the 0-100 psi gauge ( Summit or Jeg's ?). Under the dash is a switch to read engine or accumulator pressure. If your not going to use both ports on the sandwich adapter please plug the spare off, no offense given. I'm now running a Hastings filter # 426 that has cotton as a media and it's 7" long, 3/8" clearance from the cross member.These are only ideas that i've come up with so your on your own if you have any failures. Carl. [Phone number snipped], Alameda, Calif...95 Disco. "Now get to work".............o&o>...................................
