Need help on putting 93 5.0 heads on 289 rocker trouble?

I ran into this problem a few hours ago and called it a day. The problem I am having is the old heads had the studs in them the new ones dont. So that means my pushrods are to short? Is there a way to put the old rockers on the new head. The old rockers have the rail type and the new ones dont. They just bolt to the head so that means you can adjust them. I need help I would like to drive it by monday if possible.
 
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I think crane makes a stud that will thread into the holes on the later heads... not very strong, but it would be fine for a stock or mild cam

or you could figure out the correct length pushrod, and use the later rockers and maybe some shims... not sure if the later pushrods would work, I think the later roller lifters are taller.. maybe pushrods from a non roller later 302?