[blykins]

I don't think they'll work with your heads....you'd basically have to shim them up .100" to get them to the specs that Barry posted. Considering that you'll have to run a spring cup or locator, you're taking a good chance of not letting the valve seal get a good bite on the guide...and it will pop off.

The first step before you order any springs is to take a closer look at your heads, measure the install height, and then go from there.