How old is my 13-B?

[bowjangles]

Originally Posted by Rotary Evolution

if it has a hitachi it is likely a 74-78, i don't see why anyone would bother trying to make it work on a late series 13B.

74-75 had the old slanted MAZDA logo(all capitals), the 76-78 engines have the traditional logo used up until current.

If, by logo you mean the word MAZDA on the engine block, then it must be a 76-78 engine cuz the word is in upright (not slanted) letters- is this correct?