The two most notable V8 engines in midgets that I recall would be the Runyon V8, which were done by Gary Runyon out of Indy. I don't know much on the details of these engines. I do believe that Bob Parker bought out Runyon at one time and they were purchased at auction by an individual out of Illinois. Never heard much of those engines after that auction. There was also the Kenyon V8 midget engines in the early to mid eighties. I know these cars were based off of two Suzuki motorcycle engines, which were conjoined to a common crankshaft to make it a V8. I believe Mel and Don Kenyon sold these engines out to a buyer in either New Zealand or Australia. Both were very competitive at times. Don't know much about the reliability of them though?