Hi Brian,

Thank you for your interest in our products.  There is a lot to unpack here.  More than can be answered by Emails going back and forth.  There is really no such thing as a 1800cc motor. So the first question is, what bore and stroke are you thinking about going with?  Does your current engine case have 8mm or 10mm head studs?  This will limit your bore size choices.

Equally important will be your choice of carburetor.  What are your driving characteristics?  Are you concerned about fuel economy?

These are just some of the many questions that need to be answered before you part ways with your hard-earned cash!

It is best to call and speak with one of our knowledgeable team members. Our number can be found in the upper right and lower right sections of the website. Best to do this Tuesday-Thursday

Thanks, Andy