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just wondering if anyone knows,i have a 73 302 block,30 over,10 to 1 comp,it has the old smog heads,what im wondering is it posiible to pull the heads off my 91 5L,and put them on to this block???and would the engine benifit from them,or just stay with the smog ones, in the process of talking to a engine rebuilder about seeing if i can run the roller cam(have him drill and tap the holes)thanks
 

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Better get some aftermarket heads, if on a budget try some GT40s, Brodix 5.0 Iron or World Products Iron heads. Or use the stock 5.0 heads and port them with larger valves.
 
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