Original, not a reprint!! Single page taken right out of the parts book as, exactly what it says, A Handy Reference Guide To: 170 And 225 CU. Inch Engines, made for the parts guys. These were early 70's, the part # is PD-421-6-R. Very hard come buy as most of these were tossed by the 80's. The 3 pictures in this one (I have 8 different ones listed, maybe I will find more) are Internal Parts, Exhaust manfold With Heat Control Valve and Engine Assembly With Accessories. Great thing to hang up on the wall at your workbench.
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