Hey guys - quick qun.

Will this intake OOTB bolt up to a the Indy 426-1 heads? Are they a bolt on deal?

Im looking to run a shorter intake over an Indy 426-4 for hood clearance but after sitting this thing on the block there is a gap of 15.5mm b/w the top of the block and the bottom of the valley plate !! What gives?

Any advice would be much appreciated thx !

It requires Indy valley plate or similar to seal since the Indy ports are higher.

The big supprize here is that an american guy have figured out that the metric system is the way to go!

In my opinion, I see three options (lowest cost first)

1: Cut the cast-in valley plate off of the Barton intake

2: Buy an Indy intake

3: Buy Stage V heads and use the Barton intake

I'm thinking you should countersink the screw holes in the Indy valley plate so you can use flat head screws to hold it down and make the seal needed. If needed, mill a little off the top of the plate if it hits the intake anywhere or have a custom plate made up. I think AndyF makes a billet plate that might be thinner than the cast Indy plate. I wouldn't hack the intake. Sounds like more work than the plate and then you have an intake that only works with those heads. The plates are cheaper than the intake.

http://arengineering.com/home-page/valley-plates/

It doesn't look like Andy has a Hemi plate, but I'm sure he can fab one up for you. You won't need the access holes for the Hemi, so maybe you can save some money and have him make a one-piece plate.

The cast in place valley plate works with stock intake port height,we use the Indy or similar valley plates on any stock style intake such as X-rams and use the plate under it.You can also make spacers for the end rails,we have done this on blower manifolds and Indy raised port heads.You can tap the block rail and countersink the holes in the spacers and use capscrews to attach.Add a thin bead of silicone to the block side attach the spacer,silicone the manifold side and be good to go. There is more than one way to skin a cat but always start with a dead cat.

How much is 15.5 mm? If it is 1/4 in or less just use weather stripping?

The double valley plate deal works and is the easiest way to solve the problem. I've used my valley plates that way before. The other option is to build some custom valley ends. It isn't too tough of a fab job for a local machine shop.

If it was me, I'd cut the valley plate off the Barton manifold and just use the Indy plate. That way you could switch back and forth no problem. You may have to mill the bottom of the intake flange a little.
The Barton manifold would still work w/ non-Indy heads and the Indy valley plate.

Mine has the valley pan / plate removed and an aluminum sheet metal pan installed . Straight from RBRE .