It uses a Briggs 6S.Very cool but I don't have time to watch it all! First video wouldn't work for me so I didn't catch what B/S engines were used for this build. Also kinda irritating they are with holding some "secrets".
DAC
You're probably right. I would think too on the distributor and how its geared would be a major thought process too.I guess the cams would be integral with each engine but #1 piston would have to be at TDC of compression stroke while #4 would have be at TDC of exhaust stroke while #3 and #2 would have be the same as #1 and #4.