Originally Posted by 79CamaroMatt
block casting is 3932388. I was told it was a 350
The casting 3932388 is simply a 4 inch bore casting. Yes the casting 3932388 can buld an LM1 but it can also buld a large number of other engines. The books say it's used to build 302 and 350 engines which would tell you it can be used in high performance or heavy duty engines. That doesn't mean the casting isn't used for lesser stressed applications. The difference in displacement is simply the stroke 3 inches for a 302 and 3.48 for a 350 or 3.25 for a 327. I wondered aloud about what it is seeing that the casting was made into an engine in Canada. Plus the chunk of VIN you have looks Canadian. Like I said GM of Canada marches to its own drummer, you can't just take USofA codes and apply them, sometimes yes, sometimes no. I speculated on the possibility of a 327 because the vast majority of two letter F suffix coded engines are 327s. The 327 also uses the 4 inch core block so this isn't outside the realm of possibility. I cannot find where my Canadian VIN code book went so I can't definitivly help, I tried on the internet and inspite of that appearing to be a pre 1981 code it will not unwind in any decoder I've tried, I also cannot find an FR suffix code. Two letter American codes starting with an F only connect as a 1969 327 for various apps from Corvettes to cop cars. Whether that can be applied to Canadian engines I do not know at this point. The only FR suffix code I can find for 1969 is for an inline 6 which doesn't fit at all. You can always pull a head and measure the stroke. Right now this is off the map in that the available data doesn't fit the description you were given.
Yes the casting 3932388 can buld an LM1 but it cam also buld a large number of other engines.