It is my second car. It runs and drives well and it is all there. There is a small crack in the exhaust manifold and that's the only problem. I'm capable of doing what needs to be done. So what are some engines that I could put in there and keep the push button?
without changing the transmission your stuck with a /6 any year.
umm 67-68(I think it's 68 and up but not sure, ask the real knowledgeable people on here). and up I think takes a $20 crank adapter to let you uses the old pb trans or 66 on down motor have the small crank register. (don't know about the 67 but it might be small too!).
you can get headers(a replacement manifold(stock), waggins duals(a dual exhaust that won't break the bank), or dutra duals (excellent product but cost's more)) with a 2 1/4 pipe for extra breathing power for that or just go to a super six 2bbl carb setup while you at it(fixing the manifold) and get a lot more pep with your step. you will need to change over to a cable style gas pedal though.
if you go V8 you get into a LOT more money.
you can get /6's dirt cheap. the last 3 I got WITH trans were for 50.00 each. and they all ran (2 not so great but they did run, needed valve jobs) 1 was good compression and low mileage truck engine that I'll be using for my turbo build.
You are NOT usually going to find a V8 for 50.00. and if you do it most likely will need to be completely rebuild
I don't care what they say, it ain't the same money to go to a V8 'specially if you want to keep the push button trans.
since you'll need a different trans(if you want to stay PB then you'll need a PB V8 trans ,(only a couple of years work ), a dropped v8 center link, motor mounts(schumaker conversion) and some nice exhaust manifolds(headers $$$$$, 340 hipo's $$$ or 273's $$) oh and exhaust too!
preferable a new radiator also for increased cooling. plus if you want/have power steering then your pretty much stuck with headers, (and they seem to be the most expensive kind)
look up a couple of builds and questions for a V8 in an early a manifold options