Is there any noticeable low end power gain going from factory cast iron 1972 340 intake to a Weiand 8007 Action Plus ? My car is a bone stock 72 340 low compression cast crank factory exhaust manifolds small port heads 904 auto . I am in the process of switching the 3:23’s to 3:73’s from Dr Diff . Other than the wait savings is it worth the switch to the Weiand ?
