I was wodering if anyone has used one on the 420A. I found one on ebay
http://cgi.ebay.com/ebaymotors/ws/eB...category=6770. From my past expirence with V8's I know they are a good thing to used and gain some people 10-15 horse on a V8, but I have yet to hear anything about them for a four cylinder motor. I plan on replacing my rod bearing cause they went bad and I was wodering if this might be worth my money to put in while I'm there.