Hi all first post in this forum, I have a couple or RR's, 85 5speed and 87 auto. The 87 is a project, came into my possession minus air flow meter (backfire destruction, she's on gas) and air cleaner, needs a complete rebuild, also some interior bits leave a little to be desired. Have heard 3.9 pistons and cam make a considerable difference, also heard there is a particular ford model afl that is compatible, any info would be appreciated, regards Jhonno