68 ntchbk Cuda to BB or SMB?

I just purchased my new winter project and its a 68 Cuda notchback. Im happier than a queer in a dick patch!:p
I will start a build thread in the projects section today

QUESTION: BB or SMB (mild driver)
I have a 383 already and I have always wanted a 6 pack car. I am thinking mild street cam and clean stock looking engine bay with the mopar 6 pack air cleaner,Disk brakes and AL heads to keep weight down
Negative for me is the 383 is heavy and its a little car(nose heavy)

SMB ..Then I have to find one and I do not see any LA engines on EBAY
What about going with a Magnum motor say 360?? Build the 360, convert it to a controlled leak motor(carbs) bigger cam, and and a 6 pack manifold
If I went fuel injection i would go Hemi but I dont have the pockets
for that,

BB or SMB any suggestions are appreciated and thanks?