6765sp or 6765hp

[87-TURBO-T]

originally I want the ported H cover, but found out I will have to wait. Is there much of a performance difference between the ported S and H covers?

 

[John Wilde]

originally I want the ported H cover, but found out I will have to wait. Is there much of a performance difference between the ported S and H covers?

I would say little to none on a 3 bolt buick application.

 

[GNVYUS 1]

I wouldn't put the H on a street/strip GN as you won't really utilize it's potential. That's a common housing for FI track cars usually pushing high psi with a lot of head/intake work to make use of the covers size up top.

 

[87-TURBO-T]

I went with the 6765sp.