hey all,
I am looking at TFS TW 170cc ported heads with a 53cc chamber. They would be replacing 60cc GT40p heads on a 2000 mountaineer/explorer 5.0
https://www.trickflow.com/parts/tfs-52515301-c00
how much compression gain might I expect? Any reason I may want to steer clear?
Theres a trick flow stage 1 cam in there at the moment, and a performer rpm intake, holley 650 carb
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