Yes the heads can be done as well. If you want to pull them. This will take more time and depending on how far you want to go, can cost well over $1000.00. But a simple gasket match and clean up will improve power. And you can do that yourself. Also see if the headers are smaller than the Exhast ports of the heads. They can usually be opened some also.
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88workcar
1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft
Rice Hater # 42
To be old and wise, You must first be young and stupid  I'm somewhere in tthe middle.
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