[qute] Would'nt a hemi shaker base plate and lid also work with the T/A hood?

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Basically what the hemi TA base consists of is a factory Hemi shaker base that the 7 studs were never put in. Instead the outer 340-6 TA ring was spotwelded 26 times around the edge to the base.
The assembly also had the 3 nipples installed.
Same as a 340-6 TA base is really a 440-6 pak shaker base with the 3 nipples and the ring spotwelded on.
Here's a picture of an NOS Hemi TA base (the one in the rear) along with half a dozen 340-6, oval Hemi, 440-6 and 340 shaker NOS aircleaners.