are there differences between a 45 and a 37 intake manifold. My Schebler carb seems to just hit the heads on my 45 and I was wondering if I have the wrong manifold? I have invested in machining, Peek seals and plating so is there a way to pack it to fit?

The 37ci manifold is a bit longer than the 45ci manifold. 37ci is 3-1/4" tall from carb surface to the dip in the "Y" 45ci is 3-1/16". The intake is 1" on the 45 and 15/16" on the 37ci. The main tube outer diameter is equal thick on the 45, about 1-1/4" but a bit smaller and conical (or tapered) on the 37ci.

Hi Peter, if you cant find the correct type screws, use normal ones, but turn up tapered collars on a lathe to fit under the screw heads.

perhaps Indian or HD use longer ones on some bikes ?

Mike.

after some snooping around on the internet it looks like Harley 4 speed top cover screws are 1/4"-24 and you can buy a set here. They even look like they might have the correct countersink and they are 9/16" long.

http://www.jpcycles.com/product/601-756

Thanks for that! I was looking around and found another interesting bolt. The bolt that holds the saddle spring to the spring plate is kind of special, square base with a shallow smooth head, and it looks kind of similar as in this set J&P Part: 620-726. It's an expensive set and the size isn't noted in the set, so it isn't a recommendation to buy, only for comparasion...

For those that look for a bolt like that I am sure Walker Machine or some other experienced restorer might have or can recommend a source.