318 - intake vacuum leaking

Maybe he said .010? .100 would not line up well as AJ said, and I can attest to that pin holding up the works. I cracked a 273-4 intake in half trying to torque it down onto a 318 block that had those stupid pins....and the intake didnt! The LD340 may have those pin guides already: one online had them, one didnt. I also witnessed a 340-360 intake not seal on a 318 port. along the very bottom. What do the bolt holes look like with the intake laying on only the intake gaskets, no china walls? The head bolt holes will be moved toward the camshaft under the intake, worse untorqued. That cork is doing you no favors, use a silicone sealant once you determine if the heads will even line up. 318 heads are not rare, you may be ready for some different ones....