I got a buddy selling his Crane Cobra 1.7 roller rockers and was thinking about putting them on my '89 5.0. It's a stock HO motor, anyone got any opinion if it's worth the expense and effort? I'm already replacing the valve covers with the Ford Racing ones. I've googled the rockers and found some discussions on Stang.net and Corral.net. A lot say I'll have to bend in the oil baffle to clear the rockers. Also, most recommend replacing the valve springs. I found one comment that the stock pushrods won't work. I called Crane... this guy was basically looking up the parts and reading from footnotes. The pushrods should be OK and as far as springs, it didn't say to replace them, but with the 1.7 rockers, recommended to use the 44308-1 springs. Any comments on this are appreciated.