As far as the damper it has and can be done. Problem is realinging the pullies to the non Y damper. I'm sure it can be done by adapting aftermarket pullies. I would love to see your rig with a stroker engine and 471. Chuck

Stan others have pointed out the damper answer, ted has it sorted out. yes the cragar blower intakes are rare and myself and scotty have one. They are easy to make, i got offy tripower intake and milled top off and screwed plate to top, welded inside rectangular opening, same size as blower gasket then machined it flat.  will post pic tommorrow.

Although ATI does make a Y specific SFI approved damper, the pricing on that particular damper got way out of hand.  As a result, Innovators West now offers a SFI approved damper specific to the Y engines at about half the price of the ATI unit.  While the ATI damper uses the three bolt scrub pulley pattern, the IW damper uses the SBF four bolt pulley pattern.  Both of these dampers still have the belt pulley sitting ~1/2” further forward than the factory damper which necessitates relocating any accessory drives that are belt driven (water pump, alternator, etc.) off of the damper.  Here’s the links to some past threads regarding aftermarket dampers.

http://forums.y-blocksforever.com/Topic38818.aspx
http://forums.y-blocksforever.com//Topic35766.aspx
http://forums.y-blocksforever.com/Topic19528.aspx

But back to the retrofitting a scrub damper.  If the damper hole is honed just a few thousandts, then it fits the Y crankshaft.  Be sure to use honing equipment that accommodates holes with slots.   The next issue to take care of is the keyway size.  Easiest fix is to simply narrow the ¼” Y key so it’s 3/16” at its top so the scrub damper can slide over it.  Another option is to re-broach the damper itself so the 3/16” slot becomes ¼”.  Either process will require a new timing pointer or new timing  marks on the damper itself.  Another option is to make a new or fresh keyway slot in the damper so the TDC on the damper aligns with the Y timing tab.  Here’s a link showing the number of degrees to get the TDC mark aligned. And also add that a spacer must be fabricated that sandwiches itself between the damper and the crankshaft gear due to the shortness of the scrub damper.

http://forums.y-blocksforever.com/Topic21475.aspx 

Here are pictures of a Fenton 2X4 intake that’s been modified to accommodate a Roots style of blower.  This is Chuck’s engine which is going to be broken in using this blower setup before switching it over to a blow through centrifugal blower setup.

I just used offy tripower as they are more common, ports are small but can be opened up, as its only a street setup is ok. May just give you idea between teds and mine to get started. regards bill.

yyy

Chuck