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Thanksfor your responses!!
Ok, I believe what you are all saying is that most V4 crossflow internal parts (ie. crank, rods and pistons)parts are interchangeable as long as you have the correct crank seal assembly for your model year. as long as you match large or small split center bearing...
I have a good j140 block 1984 (crossfllow V4) can I use any V4 crankshaft 90-140HP , 78-95? also what is the difference in heads in a 90 vs 140. Does the additional HP come from bigger carbs and more compression from the diffferent heads. Last but not least should I only use the pat numbers in...
