914 engine replacement options - Advice and Opinions please, What are my best and easiest options? Options

[UberElectricEagle]

Greetings,
I'm new to the 914's so please forgive my ignorance.
I have a 1972 1.7 with dual carbs (weber 34) that is slowly giving up the ghost. I'm going to keep driving it until it quits or I find a replacement motor. I'm trying to figure out what my best and cheapest option is to put a good and solid running engine in my 914. Yes, more power would be awesome, but just a working motor would be great too.
What I was thinking I would like to find is a decent and solid running engine that someone has removed from their car for whatever reason.
-What are my plain stock options? 1.7 1.8 2.0 ?
--Can all my 1.7 components switch over into a 1.8 or 2.0 or would I have to get some different items like bigger carbs or a different distributor?
-What kind of fair price can I expect to pay for a fairly complete and running motor?
-What could I expect to pay for a rebuild if I went with that option?
-Can I just use any type 4 engine (say from a VW whatever) and switch all my tins and components over, or are they set up differently for the 914?

I'm looking for all opinions or what you would think you would do so I can look at every angle here. Any guidance in the right direction or ideas would be much appreciated.
Thanks,
Sam

[ME733]

(IMG:style_emoticons/default/popcorn[1].gif) Well I have been reading your various posts and all the various suggestions others have given you (every day) for awhile now...IF you think you can balance your carbs with a piece of garden hose up to your ear...well ...you are deluding yourself. I recommended that you check your spark plugs. one was oil covered and fouled, pretty old I think. I recommended that you REPLACE the spark plug wires..(and gave reasons). YOU chose to "fix" the end that came loose., I suggested that you NOT DRIVE THE CAR..until the fouled plug was firing...YOU drove the car...making a POSSABLE.....easy and cost effective ,repair solution...slightly more complicated. There was a missing bolt of some sort in the Carburator linkage somewhere(stripped). That is still not fixed. So your not going to spend any money or a little time toward solving your present engine problem. So now your solution is to replace it ...for under 1000.00.?..The reality is that Porsches are just not the right car..for some car guys. (IMG:style_emoticons/default/popcorn[1].gif)