The Stages of MGB Tuning

Ever wondered what the different stages of tuning means for the MGB. Found this article on the internet.

more info at:-

https://www.classiccars4sale.net/classic-car-how-to-guides/restoration/how-to-tune-your-mgb 

and

http://mginfo.co.uk/upgrades4mgs/mgb_period_tuning.html