Looking to install a fresh set of exhaust manifold gaskets on my 68 430 -- after I get things checked out and true I want to use fresh bolts. Todd Miller of DiecastMusclecars.com has a full set for the 455 but I'm not sure if they are the same lengths as a 68 430. I know that Buick made a few casting changes to reduce cracking/ improve flow thru the years -- not sure if that resulted in different length bolts?? Anyone know for sure?
I just went through this, with what I believe are 69 430 manifolds. There are some small differences in the thickness of the manifold at the bolt hole compared to 455 manifolds I have, but it was minimal enough that the bolt kit I ordered from T/A worked fine. I did have to stack a few washers on one bolt because it stuck through too far. If I wasn't in a hurry at the time I'm sure I could have swapped some around to avoid this, or at the least cut the bolt down. Definitely either way a lot nicer than having to re-use bolts.
