Warranty replacement of a 340 in 1970
Chief I have a little different story.
Arrived at N.A.S. Miramar, May of '70 which would end up being (due to an extension in 72) of 4 years. I was a GCA RADAR tech (ETR) and also maintained the TACAN there. 24 on, 48 off!!!!!
My first RR was bought there in San Diego, used, a 69-383 4 speed. Later I bought a 70 440sixpack RR. "We" had a little trouble with the 440 later on.
Later, I obtained a 64 426 Dodge and thought I'd build it for the drags/ occasional street, and "fix" the RR for a driver. I bought a REAL low miles 340 and put that in the 70 RR. One of the smarter things I've done.
Unlike your duster, that '70 would get over 17 mpg on a highway ride, and never used more than a quart of oil between changes. When I got out of the Navy in '74, I towed a '70 Cuda, loaded to the gills with parts, tools, and "my stuff" from San Diego to N Idaho.
340's were great engines. Mopar missed the ball by NOT putting them in the B bodies before the demise due to smog. Would've been great matchups for a 350 Chevelle