Anyone know what the difference is between these two motors? I'm asking
since I have a Merc Grand Marquis 5.0 to put in my 1966 Mustang. I bought
the Merc thinking the 5.0 was a high performance engine, but it isn't "High
Output." Runs well though.
I do know the firing order is different.
Gary in NC
Gary, Pretty much the block is the same. Everything else is different. You
didn't mention the year, starting in 1986, they both have roller cams,
different roller cams, but almost every other part except the cap, rotor and
wires is different.
Hmmph. I didn't know all that was different. When I looked and saw that
the firing order was the same as my 66 motor, I didn't know where to start
as far as differences. My motor/trans is a 1990, AOD trans. I'm glad to
hear it is a roller cam engine though. Is there a website to look it up?
Thanks for your help.
The main difference is the cam, which gives the HO engine the same firing order
as the 351, which means you will need a processor for the HO. Depending on year
there will be other differences like heads roller cams and intakes.
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