theres a whole lot involved depending on what you want out of it.
I've got a bunch of PDFs that cover all variety of engine design and calcs etc. Does anyone know where I can upload them for you guys to view? it has an excellent section on manifold runner lengths and design.
o.k I won't upload the stuff I have then.
iv cnc milled the flanges out all ready too go. any info wanted. not sure were you should post it? was also thinking of making ally crank, power stearing and alternator pullys. would that help things much?