[lust4speed]

Ken Crocie put me in contact with one of his friends at Edelbrock about the RPM manifold fitment issues I've experienced. I took the opportunity to mention that the RPM has always been too large as delivered and approximately .060" has to be removed to achieve proper port and bolt alignment with the heads. Edelbrock doesn't have any complaints on file, so I contacted Butler for his experience, but he stated that they really haven't noticed alignment problems with the manifold. So his company's experience didn't support my asking for a change in the specs. I was hoping that we might finally have a shot at not having to mill these out of the box, but that is fading away.

So I'm requesting that you to post personal experiences below with your results on the RPM lining up with the heads. If you could limit responses to the RPM it would make for a stronger case. Please post both positive and negative responses for the RPM manifold only on fitment.

I'll include some photos taken over the weekend. First photo is a new RPM manifold from Butler out of the box, new Edelbrock D-port heads, and a stock deck height 455 block and no intake gaskets. Bolt holes align before the .060" gasket, so of course it will be off that amount when the gaskets are in place. So this new manifold will be going in for milling adding another $110 to the final cost of the manifold. The far engine in pic #3 also has an RPM on it and that manifold needed to be milled .060" to align properly.