Quote:
Originally Posted by BR3W CITY
Ya but doesn't the LS7 use a rectangle port also? You can put the LS7 intake onto an LS3. The runner design is made for higher cube cars, but I don't know if I'd say its another port type. It'll interchange, just not necessarily make the best power on a sub-400ci engine
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Yes, it does use a "rectangle" port, but LS7 heads are completely different than LS3 heads...larger intake and exhaust ports, different valve angle, larger valves, and as homemade87 pointed out, the port and intake manifold bolt spacing are different.
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