Been busy getting parts together, went to the salvage yard in Prescott and found three LUV's. A 74, 79 4x4, and a 78 Mikado. Very Sad to see but I was like a kid in a candy store, with a pocket full of change, so limited on what I could get
So mainly got some of them little parts, e-brake cable, hood release cable, door armrests, and some other stuff. Grabbed the dual headlight buckets from the 74. Pulled the head off the 4x4, not good, cross threaded spark plug, semi crispy valves. Had a new head gasket but there was severe rust in 2 cylinders that were steam cleaned.
Pulled the Mikado head, unlike the 4x4 this truck was maintained, new head gasket, valves pretty clean, and the engine all stock. I think it ended up in the yard because the cam sprocket was worn out and the chain was down in the pan.
So some side by side pics of the 200 head and 180, the big difference I noticed was the 180 has better intake flow, more symmetrical. The 200 has the better cam assembly. The shiny parts are off the 200.
200 above 180 below, the 180 has been stamped .015 so I think it has been shaved.
200 intake port, not to symmetrical around the base of the valve.
The 180 intake port.
The 200 parts look like they provide better oil flow, little slits along the rocker rails and slightly larger holes and much larger rockers.
So I ended up using the 200 cam, springs, rockers, rails, and caps. Since the 180 valves cleaned up really nice I used them, strange that the 180 intake valves, and the numbers for both sets are correct, are a bit larger in diameter than the 200's while the exhaust valves are the same diameter but the 180's are slightly longer.
I know the bore on the 200 is slightly larger than the 180 but the difference between head and piston is nearly a half inch