The alternator bracket bolts to the block and head on the 2.9
and to the head only on the 4.0.
and while the 2.9 and 4.0 are from the same engine family the block
and heads are very different.
the later design alternator can be adapted, but you have to search the ford CAR section of the junkyard to find a "pivot bolt mounting" version of the alternator
AND the truck section of your junkyard for the alternator harness.
It's a PITA but not impossible to retrofit the later design alternator into an '86-92 RBV.
But the "three bolt" type frame just isn't gonna happen as easily...
And the "easy way" would be to fabricate a bracket.
I ordered a 200A PowerMaster unit from Summit. PowerMaster says their 200A alternator makes 140A at idle and 200A at around 2200 rpm...can't wait to get that sucker installed!
I am going to upgrade the power supply wire to 4AWG wire also.
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