My 95 Jeep Wrangler YJ has a problem. It does not run. I am told the engine is the problem, something about warped heads of some kind. I was told that I should swap my existing engine out with a chevy small block because they are a dime a dozen and because it would give me more power. Is this switch easy to do and is it cost effective? Also, how much should I be willing to shell out for such a swap. Any input would be much appreciated.