MSefi.com read only forum (Jan.15,2018)

HI MS fans,
I'm using MS2 w/3.0 board and 2.881 code and using the MAP sensor in the MS2 ECU box. Just ready to crank the engine for the first time since the conversion from carbs to EFI and checking sensor outputs in Megatune. The engine MAP reading is 80 kPa instead of the 100 kPa that the manual says I should get. I suspect the reason might because my altitude is 6200 feet above sea level. Is this the reason I get 80 instead of 100? I've set my parameters at default settings in Megatune without any consideration for my 6200 feet altitude, so should I change the settings for my high altitude? Thanks very much for any input.
Gary

Thanks Lance.
Your support is very much appreciated; it's beyond great. But living at 6200 ft elevation is not so great for engine performance. Gonna turn the key now for the first time and hope for the best. Confidence is higher now.
Gary