I would like to thank all of those who responded to my post. You have awesome ideas.
I will look into the Subaru transplant as a viable option. The SVX with its broad torque band and >220 HP, is VERY interesting.
On a quick note, I opened one of the links, pertaining to the V-6 Baja. There is another link within that site. It referred me to Robert "Rob" Wilkes, located in Corona, California USA. Having read the information displayed in the link, and realizing that Robert is only a few miles from my home, I called him on the telephone.
Robert was receptive to my inquiry of his project. Robert has built a Manx style fiberglass, long travel, A arm suspension, street driven dune buggy. Robert used a Honda / Acura 3 liter V-6 engine.
Researching this engine I have found that it produces more torque and horsepower across the entire RPM range, than does the Mazda V-6 (referred to in one of the above links).
Personally, I shall have to overcome my hatred towards the Honda / Acura marque, before I can seriously consider it as a viable powerplant option.
In regard to a VW Type IV - Porsche 914 2.0 liter engine, I cannot consider it viable.
The VW Type IV - Porsche 914 2.0 liter engine is plagued with exhaust seat issues. Yes, I do realize that many shops claim to have solved these issues with their machining and installation techniques. However, I personally know of far too many of these engines which have had their cylinder heads modified, to continue to drop exhaust seats.
I do have connections with high quality CNC shops, that specialize in the machining of billet engine components, including cylinder heads.
An ACVW Type IV billet cylinder head could be produced with an altered exhaust port, similar to that of the ACVW Type I. Of course these billet cylinder heads would not by any means be inexpensive. Preliminary estimates range from $3,000 (USD) to $5,000 (USD), per pair. This would include all valves, springs, retainers, keepers, shims, studs and a quality five angle valve job.
Reviewing the overall cost of building a performance oriented ACVW Type IV engine, versus the overall cost of another production engine, excludes the Type IV from further consideration.
Once again, I thank all of you for your postings.
Respectfully,
Chris Andrews - The Mailman