Intake plenum divider modifications.....

No picture available from the phone, but I did the MoPar engines book mod on my LD340 set up for a TQ. The engine was at the time still on the mello side. Small cam etc...

The first thing I notes was a slight loss of bottom end but a worthy top end power increase with a higher RPM ceiling. The lack of a plenum divider shortens the runners changing the intakes chraricteristics (sp?) a little bit.

For your particular intake I myself would have tried a spacer with that mod after trying the spacer itself as OOTB. Another area to look at is the entrance from the plenum into the runner at the roof.

Let us know how that works out.