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There isn't a difference between a B and RB unless the RB is a Hemi and then it's only the size of the hole drilled and tapped in the block .



I purchased the 4529565 which the MP catalog lists for an RB application.

Engine is 70 383 HP with windage tray.

Do I need to get the 4529564 pickup instead?

Thanks



What pan do you have ? The 565 is a straight tube and it is to be used with the 6qt HEMI pan , it will work with the 187 pan after a slight bend and/or adding a windage tray and gaskets .

If you have a 402 pan, which is what was installed on a 70 383, you need the 564 pickup.

This is where the applications in the catalog are screwed up because a 68-69 440 (RB) uses the 402 pan ... the 893 pan for the A body can use the 564 pickup I set one up with it earlier this year ..

Though the other pickup with it's thinner tube wall might be easier to bend ??? But be careful bending it, either use heat or some type of tubing bender, you don't want to break the boss off in the block.