Conversion Chevy Blazer K5, 5.7 L, BJ.79 to Euro 3 possible?

Hello. Yesterday I received a Chevy Blazer K5 for my Dodge Ram. The car is BJ.79 and has the 5.7 L engine. Is it possible to upgrade it to Euro 3? If so, what does that cost about? Or what do you have for Idenn the tax-friendly drive? My last Blazers were combination vehicles, but that unfortunately doesn’t exist anymore with the 2.8 Ton story… I am very grateful for every suggestion and idea!!