1915 Engle W110 cam, A1 Sidewinder (1 1/2" primary tubes?), Empi IDF's, probably stock dual port heads- any where from 85- 100 or 105? hp depending on the intake port volume, how well they line up with the intake manifolds and compression. Lots of fun in a Speedster!
Some porting work, slight raise in compression and 1.25 rockers- anywhere from 20-35 more hp!
51515 Wix or comparable Napa Gold filter (they're made by Wix), 10w-30 Brad Penn (called Penn Grade now?), Valvoline VR1 are all I can think of at the moment.
My work here is done. Al
PS- Don't do the 'R' racing filter- read your previous thread Theron linked to