Re: gt40 vs gt40p
I have to agree with the post above, a few of you should take a look at Tinman's videos going high 11.6- low 11.7 with gt-40 iron heads on a N/A 302, or his dyno videos of his 347 putting down 360 RWHP, 355 RWTQ with another pair of gt-40 iron heads.
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