http://board.moparts.org/ubbthreads...in=5873659&Words=+mopacltd&topic=&Search=true
Comments below are copied from link above....about 3/4 of way down page
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Are we discussing the P4452893 intake manifold? And if so, will it bolt to a set of Edelbrock heads?
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No.
P4452893 is actually the casting number.......for 2 different intakes.
The P4529460 was machined to fit the raised ports of the W-5 head.
The P4452891 was machined to fit the factory LA heads, Edelbrock,
Indybrock, Brodix B1-BA, Small Port Commando.
If you have an intake with P4452893 on it and the bolt spacing
matches your heads, it will work.