Good Slant 6 Set up?

Bone stock for the time being and it's a low deck 170/6
running waggin dual exhaust 2, 2 1/4 to the tail shaft to a 2 1/2 to the quite V8 muffler, Moved the battery to the turtle hull passenger side and installed a 93 Jeep fresh air filter system.
then a 2'' tail pipe, Holley 390 double pumper electronic ignition 3:23 gears daily driver.
Love it about 26 MPG and smooth as silk for now
Not a screamer but still runs 11:50 1/8 mile when needed.
Nothing to right home about.