Magnum 45 , Gerald. Havnt been able to score a cheap Royal 45 .
A vord off vorning ,
You can spend a hour meticulously drilling centering & reaming the spray bar hole , in a Magnum case ( 40 & 45 ) ;
Parrallel to the Cinch Bolt & centered in the intake ( Takes the OS 40 S intake ) .
Fit the Spay Bar & observe from above . The #%*! thing is 2 or 3 degrees ANGLED . Like the Cinch Bar .
THEREFORE DONT use the cinch bar hole as a referance with the Vernier or Mallet .
Willum PMum you , Gerald .
The 45 in the Magnum thing with the 12 x 4 3 Bl Bolly pretty much ' locked in ' , muffler bolts strip easy . Replaced 4 B.A.
Copy of C S C muffler raised objections. Significantly Quieter when it Fell Off .
. ( 1 extra head gasket ) .
Want to fit a 45 to the P-51 for some reason. Probably authority on the 4 blade prop .& overhead injun authority .
The OS Front Case goes straight on the rest of the Magnum .
Swaping Case / outlet to outboard side, the rod big end chamfer for the crank radius needs to be taken into account ;
i.e. leave the rod front at the front , pull the wrist pin, reverse the piston so it still matches the bore as per original .
refit etc.
Trying shaving the block to drop the timing will see S.P.I. / exposed under piston @ T D C .