Question about my 94 accord EX

What is a good engine block or engine swap for my 94 Honda Accord EX.
I was thinking about a B18 from Dart Automotive but I dont know how much it is going to improve my car. If I was to bya new engine block what else am I going to need to buy, for example will I need to get new pistons and other shit like that? If anybody has any suggestions let me know

94 Accord EX
Greddy Evo cat-back exhaust
AEM V2 Cold-Air Intake
Venom 400 Performance Module