well your 25.4 is your 26 with stock crank/26.3 + 1mm stroke/27.2+ 2mmstroke
36 mm is your 28.5/29.5/30.5 with the diff stroke for diff folks .lol
the only problem with this is head clearnace shimming ect. most often you can get a long block from a engine builder just as cheap or a few bucks more an us you pieces to run it.
heres a link to dog pile racing good products.
http://www.dogpileracing.com/scripts...?idCategory=24