"If you look at the rpm at which the hp ratings were claimed you will see the 312 hp rating is at 200 rpm less. Enough rpm reduction in the HP curve to make a 330 hp 383 look like a 312 hp 383."
I think you may have the answer here. The 430 had different HP ratings between LINC, MERC and FORD applications, even though the J code BIRD engine came off the same assembly line as the LINCOLN.
I have a 1958 MERCURY ADVANCE MAINTENACE MANUAL (Oct. 57) that states in the engine(s) descriptions;
"The Marauder engine for Monterey and Montclair" and goes on to describe further the specs on the 383.
I also have a 1958 MERCURY MAINTENACE MANUAL (Jul 58) that states;
"The MARAUDER engines for Monterey and Montclair..." and goes on to describe further the specs on the 383.
Were there actually two different ratings offered as to impress the new car buyer when he bought a fancier MERCURY or was it just a gimmick by taking the HP rating at different RPM's?
If the differences (if any) weren't mentioned in any service literature and/or bulletins, then a search in the MASTER PARTS CATALOG and sales material of the period may answer the question.
I Am Presently Looking For Any Factory/Aftermarket Parts/Information Regarding The MEL Engine Series
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