Dual Quad 318... I used a 273 intake

Offenhauser - I think the number was 5488??? Don't quote me on that... LOL. Anyways, it's the Offenhauser 360* dual quad for a early 273
Did it bolt right up? I just picked one up in a package deal and looks like it'll fit without any fabrication. Bolt holes look like they might be tight fit on an edge. Would like to know, Thanks