Need help picking a V10 Viper engine for my project

[demon34071]

I am new here but after talking to several other folks on other boards (FABO, MOPARTS, VIPER ALLEY) they recommended me posting my question here as well. Hopefully I can get a strait answer once and for all, but I'm sure I'll get beat up some here as I've been beat up elsewhere.

My project -- I am putting a V10 Viper engine into a 71 Dodge Demon pro touring car. The project is already well underway and I am at the point in the body mods that I need to get my motor bought for the project:

Here is the plan ---

Viper V10 engine -- GEN 3 (Visually I like the intake and covers better) and I can't afford a GEN 4

Engine will be mated to a new TCI Six-Speed Automatic transmission -- YES an Automatic -- its built off of a GM 4L80 case, but it also comes with both auto and manual features and has Over Drive.

Engine and Trans will be mated via TCI's adapter plate for this trans case (4L80) to a viper engine. So bolting it up is not an issue. Neither is controlling it as this trans is a 100% stand alone unit from the engine.

Questions:
Which year engines do not have the rear flywheel crank trigger location?

Would it really matter if crank trigger was on the flywheel or not?

Do I really need to start with a V10 Ram engine that had an automatic in it or can I use any GEN 3 engine?

I'm sure the answers to these questions will launch a series of other questions. But these are biggest stumbling parts me and my team of builders have run into so far.

I already know that the pan on anything other than a truck version will not work with my clearance issues and will need to be changed to the truck style, and then cut down for road clearance. Among a whole slew of other this as well. But I can't begin to worry about those items until I get the crank trigger location question answered.

Any help would be greatly appreciated.
Thanks
Derek

Moparts - Demon71
FABO - demon34071
Viper Alley - demon34071
Lateral-G - demon34071