Headers & 90 degree oil filter

The oil filter adapter was designed for use with the early 340 manifolds. Without the adapter you won't be able to use the 68 - 70 manifolds. I never had a problem with either systems.

One thing I can tell you is the larger the filter the better it flows. WIX or NAPA gold are the only filters that do not fail and should always be used. I have seen Fram filters fail on engine dynos. Start cutting them apart and take a look at some after oil changes.

If running a remote filter always mount it with the canister down. Keeps the filter full when the engine is not running and stops dirty oil from flowing back to the motor.

When using a oil cooler. mount it with the fittings on the side . Feed the bottom and exit the top. Uses the whole cooler this way and never gets air trapped.

The original poster stated about less heat with the 90 he is correct. Headers do get cherry red while cruising. almost to the bottom bend. Mount a camera you will be surprised. Or just hold the throttle at half in the dark and take a look.