This was analysed by Buecker long ago and published on chesscafe but the site is no longer there. You could find it with the Waybackmachine if you really want.
Or you content yourself with this information:
https://www.ianchessgambits.com/englund-gambit-qe7-and-nge7-lines.html
Yes, I know. We can just play 4. Nd3 and call it a day, but I want to know the juice. The tasty yummy juicy stuff.
So we defend the gambit the hard way and get ourselves into black’s mess before whipping out our theory and destroying black. Then we come to a fork in the road.
Chess.com engine prefers 8. Nd5 while Lichess engine prefers 8.Rb3. They are both strong moves, but has anyone come to a consensus about which one puts you into a better position?