Windoze 7 may not like the post box...............
It looks like the shaft mount rockers might have a lower profile. Do you think they would fit under stock 289 valve covers?Robert
I'll pick up a by-pass hose and see if it makes any difference. It's one thing I'm sure that won't cause a massive failure!
If past performance holds true, those covers will be off soon and he'll be able to take some measurements.