The piney/resiny flavors from Chinook and Special-B clash on my palate. However, this doesn’t mean its a rule. Its just what I happen to taste.
I do LOVE piney/resiny hops in porters/stouts, but I think it benefits to have a bit of floral/citrus hop notes to counter-balance. Otherwise the flavor is very linear, and with roasty/chocolate flavors can taste like chomping on a dirty pine cone. If those homegrown hops have floral/lemony/citrus notes, throw 'em in!
So i was going to try the Brown malt suggestion but the LHBS was out of it, so i went with Amber malt. oh and the hops are thought to be Cascade, i’m thinking of rearranging my hop schedule and adding some dry hops and mixing the “cascade” throughout the boil
If you’re using homegrown hops, I would recommend saving them for the end of the boil. Since there’s no real way of knowing what the actual AA% is, you might as well save them for where you get the most flavor/aroma but less of an effect on your IBU’s.
FWIW - Otter Creek Stovepipe Porter is one of my favorite beers, and they use Nugget, Cascade and Willamette. Even though the Stovepipe is a lot roastier than what you’re going for here, I think your hop selection will be very good in a porter. The Chinook has a fairly aggressive bite when used for bittering, so just be aware of that.