If goal is 400, the M-90 is the ticket. Very reliable

Can't get anymore reliable then adding a few +30hp NOS stickers!

In all seriousness an M-90 would do you just fine.

I have takin my stang to brenspeed many times. Its a grada A shop and 2nd to none. Alot of people like AM but I think brenspeed takes the cake b/c they race the parts they sell. U wont be dissappointed. Call them for your goals and they will let u know your best options. Keep in mind that HP is addictive so if u go with a m90 and u want alot power that system isnt as upgradeable as some of the others. Just keep that in mind too.