This may be irrelevant but the 261 is unique of all of these engines in that you have TWO 1/2" ports on the left intake/exhaust manifold side of the engine. The uniqueness is, if you do not connect those two together, your engine will last about 1000 miles of you are real lucky. They must be connected together! All of the rest of the engines, it doesnt matter because the oil flow is but a sample of the full flow. Also, the 848 head is NOT a native 261 head, but is a GREAT head for the 261 IF the engine shop drills two steam holes in the appropriate place. Maybe you know all of this, but the 261 engine is different in those ways.
Last edited by Woogeroo; 03/02/2015 1:00 AM.
