Need help with rims and tires for my mavh1 v8

[Socalhoodlum]

Have issues with figuring out the right displacement for my rims I am about to lower it from stock about two inches and haveing 17s on it after the lower might look a little funny but I’m look at 18 inch rims 10-10.5 in the rear and 18x9-9.5 in the front but not sure what to go with as well I’m on the fence with the rubber I was looking a bfs copper and people keeps trying to push me towards nittos but I have read some negative things about all but info would help out a lot

 

[Mustang5L5]

Always thought 18" saleen wheels looked great on those cars