Reply To: Block interchange/modification questions.

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June 8, 2006 at 8:25 pm #60591

theo

quote :

Newer, 302 engines, since 1968 I believe, require a flywheel and front damper for a 50 ounce out of balance so don’t use your 289 flywheel or front damper!

The “302” engine was produced until and including 1978, and has 28 oz-in imbalance, same as the 289 and 260. The “5.0” engine was produced from 1979 to 1993 and has 50 oz-in imbalance, which requires a matching flywheel and harmonic damper. Professional Products make dampers that have the correct length (3.0 inches) and both 3 and 4 bolt pulley patterns, so you can bolt on the stock pulley if you want.

The 5.0 became available with roller camshaft in Mustang applications after 1986 (I think). This roller cam is made of steel and therefore requires the matching steel distributor gear. Non-roller camshafts can use the standard cast iron distributor gear.

-Theo