I think you are wanting to put in on a stock used engine. If it's sound to start with you should be ok. On the 125 shot start with retarding the timing 6 degrees and work back up ( abouy 30 total). Stock 360's run good with about 36 - 38 total. Test your fuel pump pressure and output!!! And make sure to use good fuel when using, like 93 octane. Also follow the mfg. instruction. And last have FUN.
