Would like to boost the hp, ( or acceleration) on my stock 93 244na. It is in pretty good shape, Engine is clean inside, has 200k..auto. I was thinking about retarding the cam ? and maybe higher flow injectors. Thanx for your input.

 

You could change the cam using a kit something like this:

https://www.ipdusa.com/products/8771...mbs=0,986,1061

I'm not sure how much performance you would gain. Higher flow injectors will mess up the fuel mixture unless you are planning to change out the fuel map using a different ECU and properly tuning it.