i was looking at an edelbrock intake base its part #ed3860 i was wondering what bolt pattern was on this manifold new, old, or both?

 

I just fitted this manifold to my setup a couple of months ago. I have an 87 IROC and changed the heads over to L98 aluminum ones. Now if I remember correctly, the origional manifold wouldn't bolt directly to the new heads because the angle of the centre bolts was different. I'm 99% sure that the edelbrock had the option of both bolt angles.

Can someone confirm this? I'm almost certain they do. I'll try and check tomorrow when it's light outside.

Rob