mazdatweaker_2
+1y
If you are talking about an 84-86 626 head, as I recall, I think you would have to swap in the intake manifold too, because the 8v head has round ports and the 12v head has square ports. So that would have to be taken into consideration. Other than that, it would fit.
I think the swap would leave you wanting more. These trucks just don't get exciting with 86 hp.
My .02.