can I use a septic tank additive of massive counts of bacteria (maybe mixed with water)to pour over my garden area to help disolve cat poop?
Yes, if you can keep it wet.
I wouldn't unless you want a smell all the time mix in a lot of baking soda
yah it should all line up the only difference is the engine the body n under carraige is all the same you gonna need new headers other then that u cool