I found a few links of Tommy Ivo's stuff on the web. Here are some of the urls that you might want to try:

http://www.dragracingonline.com/spec...nengine_1.html
http://www.carcraft.com/thehistoryof/65502/
http://www.hotrod.com/thehistoryof/52858/
www.tommyivo.com

not sure about this one, but it’s worth a look:
http://www.theautoindex.com/makes002...ods/auto/index

Most of those are just photos (some include photos of the 4-engined, 4WD dragster/funny car), but several of the shots could give you some ideas about the engineering of such a combination.