Hercules questions

[Indy]

Hello,
I am new to this site and while I don't have a Cletrac, I do have a truck from the mid 20's that used the same engine. It took some time to find but I have a model OX Hercules and my question is do any of you have the OX in your Cletrac? I have seen the OOC in them before and this is almost the same engine but has a 1/2 inch shorter stroke with the same size bore.

I need to know what parts will fit my engine because my manifold has the exhaust comming out of the top like on your tractors and I need one that comes out of the end to go down past the floor of my truck. When I find one that I can use, I will have a real nice manifold for someone else that needs one that should work on other engines like maybe the OOC, and others.
I also need to know what generator fits this engine since it did not have one on it. I know where I can find parts for a JX model Herc but it is a 6 cyl. and mine is a 4 cyl. and I don't know if the starters and generators would interchange.

I know you guys can help because I have seen a lot of good info in just the short time I have been here and I feel I can contribute a little also from some of the things I have found in my search for parts.

I have attached a picture of the engine I am working on and I also have other pictures of it and the manifold I need in case anyone wants to see it.

Thanks,
Bob