[propricer]

I've done most everything you are interested in except for the 928 into a 914 which is pretty darn close to absurd and, all things considered, I would go with the Chevy V8. I currently have a pretty much stock, original 914-6, a full race 914 with almost 300 Porsche ponies and a 72 914 with a 300HP 327. While I LOVE the Porsche 6, it's just too expensive ... more than 10x the Chevy. Either keep what you have as stock or buy a 914-6 or put a 283/327 into a 73 or earlier 914. That's my 2 cents ... good luck !!!