Long Block Engine Assembly
NO PART OF THIS DOCUMENT MAY BE REPRODUCED WITHOUT PRIOR AGREEMENT AND WRITTEN PERMISSION OF
FORD RACING PERFORMANCE PARTS
Please contact the Tech “Hot Line” for the most current instruction informa tion (586) 468-1356
! ! ! READ ALL INSTRUCTIONS PRIOR TO INSTALLING ENGINE ASSEMBLY ! ! !
1986-93 5.0L HO Mustang Production Engine Assembly
This engine assembly is built with the Production 5.0L crankshaft, rods and hypereutectic pistons, resulting in a 50 oz.-in.
unbalance factor. The da m per and flywheel/flexplate included are compatible with this bal ance specification. The damper
and flywheel/flexplate combination for your particular application may need to be re-balan ced or modified for compatibility.
(See #1 and 2 for more details on bal ance).
Although this engine is intended to be a dire ct replacement for 1979-93 5.0L Mustang, it can be adapted to any 289/302
situation. Consult your Ford Racing dealer or call the Ford Racing Tech “Hot Line” @ (586) 46 8-1356 for advice regarding
your specific application.
Front Accessory Drive
Must be selected for your particular application. This engine is equipped with a short serp entine reverse rotation
water pump, timing cover and damper with an unbalance factor of 50 oz.-in. designed to be us ed with 1979-93
Mustang front accessory drive components. If your applicatio n calls for the use of later model short serp entine
or “V” belt components, consult the additional parts list for help.
A. Engines designed for u se with Manual Transmissions are ship ped with a 157-tooth (13-1/4" dia.) flywheel
with a 50 oz.-in. unbalance factor.
B. Engines for use with Automatic Transmissions with a 164-tooth (14-1/4" dia.) flexplate with a 50 oz.-in.
unbalance factor use. These flexplate s fit AOD or C-4 transmission application s. For C-4 tra nsmission
applications with a 157-tooth (13 ¼" dia.) flexplate with a 50 oz.-in. unbalance factor, use Ford Racing part M-
6375-E302. The supplied flexplate will not fit C-6 applications. For use with a C-6 the flexplate needs to be
removed and replaced with Ford Racing part M-6375-J302.
Tech “Hot Line” (586) 468-1356
Factory Ford shop manuals are available fr om Helm Publications, 1-800-782-4356
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