After tons of searching and question-asking, I think I've narrowed my distributor choices down to the MSD-8366 or the MSD-5591. Other than the 8366 being billet aluminum (as opposed to cast), not sure why it would be $115 more. Both are computer controlled. Hoping someone can shed some light on the differences and if it's worth it to go to the MSD-8366. Thanks.

PS - This is going in a 1985 Camaro 383 Stroker with a HSR and 90 - 92 MAP ECM and wiring harness setup.

 

In case anyone else was wondering...

Talked to Summit about this. Was told that the 8366 can be used in marine applications and that's why it's more $$$.

Talked to MSD and found out that the cheap one really is cheap. The 5591 isn't even manufactured by MSD, it is made at an outside company and is basically made of all standard material. The 8366 is made in-house and consists of higher end components and materials.

 

I have the 8366 that's going into my build. Good to know I have the higher end one. Thanks for the follow up.