Can I even swap my 1989 7mgte engine and r154 transmission into my 1st gen 1983 rx7? Is this even possible ? If so I need the full know how. Thank you!

 

just about anything is possible. you'll have to research it though and the best place for that is in the Non-V8 Engine Swap section. while i know the M and JZ engines are two different families, you may want to include the 1JZs and 2JZs in your searching as well.