Magnum swap-what all mods can you make still using factory efi

I know the hypertech leaves some on the table, but I can't complain about the torque. First gear is useless if you hop on it from a standstill. It is just a 318 after all. I have the mpi intake like the one in the pic. The cam is the original R/T cam MP offered. The .050 specs are 204/208. I tried a MP PCM from a 360 ram that worked extremely well but the gauges would not work.

Had a buddy run his 318 with the same cam, but with the original beerbarrel intake. He was 30 hp less but about the same increase on the tq side of things. To be expected I suppose.