I was going to reply to your M21 question, then read through the replies, nad saw that it was never answered...
Quote:
Originally Posted by R 70 Judge
So based off the PHS is it correct to assume my car was a M21 3.73 build originally?
Axle-Perform Code 368
Radiator-HD Code 701
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yes I believe so.
If those were not present, I believe it would have been an M20 car;
What is a bit fuzzy to me, is that the M21 required the 'performance axle' (3.73:1), but the performance axle could be ordered separate;
I am sure someone more knowledgeable would be able to chime in and clarify the invoice differences for an M21 vs M20+3.73 car.