which intake should i use?

rigger3006 said

maybe that streetmaster port matched and hoggedwith a 2'' open spacer out may surprise me!lol

Click to expand...

And not in a good way. The runners in a streetmaster reverse taper from the intake ports to the plenum instead of from the plenum to the intake port.
just my $.02
If you’re dead set on the combination use the LD4B without a port match. Leaving a little bit of a step from the intake into the port will help help reduce low rpm reversion with the 109 LSA. (Actually 107 degree LSA, I didn't bother to look at the specs... Thanks QuickDart360!)