I just acquired a bunch of McCoy (Duromatic early 60s??--no Testor lightning bolts on polished aluminum crankcase) red head .19 sport/stunt engines and bone yard of same). They've cleaned up nicely and are tight, slick, smooth, and low mileage,  but it is apparent that previous owner/owners have disassembled engines and there are few areas where one can re-assemble things bass akwards if they don't have knowledge or good technical drawings/instructions.

So here goes:

1) Does piston/cylinder head baffle lay to the intake by-pass port side or to the exhaust port side of crankcase?

2) The cylinder can be installed into crankcase in 2 orientations. One cylinder port is cut slightly lower and wider than the opposite port. Which is exhaust and which is intake by-pass port? 

3) What to use (composition and thickness range) for head gasket, cylinder to crankcase gasket, and backplate gasket material)

4 What is the correct "aim" for the single orifice spaybar? (straight down vertical, lineally oriented to venturi throat angle, or horizontal)

Thank you very much Jim. One of these engines does not have the plastic (Delrin??)  crankpin plug and some slight scratching is evident on backplate cover from this. I doubt that this item is easy to find. Possible solutions??

Thanks Ray. I live in B'town btw.   

Back to Jim--Re: spraybar orifice orientation.  So if I'm viewing  the exhaust port (R/H) side of engine; the orifice would be aimed at approx. 8 o'clock or approx. 4 o'clock?

   I had several of the teflon inserts fot the back of the crankshaft made (I think Scott Reise made them.  I probably can find one or two in the junk barrel.  I have also seen those brass rivits that are used to hold  the standard drum brake linings to the shoes used  instead of nylon or teflon.
  E-Mail me if you want one of the Teflon ones (if I can find them).

  Bigiron