You will also need to fabricate a oil return line on the 4 bolt. I used all AN stuff, -10 line. Lucky I had some of the fittings and my friend had some other pieces laying around to help figure out correct angles. Built mine out of race car spare parts. :)
Just a heads up for the 4 bolt piece. I assume you are running a V band downpipe? I had to machine the OD of the exhaust housing so the ring could be welded in place. Here are some pics of mine....
I have run it with and without the EGR tower. You can trim the gasket if the EGR is not being used. The stock Plenum can be ported a lot. I might have some pics of one I did where plenum was port matched to a ported 62mm stock throttle body.
I'm getting ready to pull the seat and mount mine. I was thinking the same.... A bracket would make it easy. I also may switch over to race seats. So hopefully it all clears.
One watch out and something I encountered on my Harland Sharps.... Check the contact pattern of the tip the roller on the valve. If it's not pretty much dead nuts center, it will beat the guides out of the cylinder head. I ended up making spacers to correct this issue.
Longer bolt compared to...