I have a 90.5 x 78 in the garage. It's calculates out to a 2010. Denis Dodson <coocoo@xxxxxxx> wrote: That is a good idea, Shirley, about the engine in Ruby, the Ghia. It is almost brand new. And if you will send me the Porsche engine, Dunc, I'll pop that booger in as soon as I get it. I do think that it will go this way: Tomorrow, probably, I will pull the engine and take it up to Wayout where he says that he has all the tools to do machining and build. We will, at least, tear it down and as Will suggested, see what we have. Then I will either build the new engine there, probably using the 90.5 pistons and cylinders, or take the parts and bus down to Chuck's and build it there the week before T@P. I have to tell you guys that it fees really cool to have four engines offerred as loaners, not even counting the Ghia. Thanks y'all. So, if I use the 90.5s and I have a 78.4 stroke, what will the new engine size be, and what is the formula, anyway? Multiply, add? I have a 1914, how do you get that number