your GT40 will compliment your ported stock heads very well, thats basically what I have and it runs great together, i've got 1.7s with the stock cam, and a B303 will go in in about 6-7 weeks
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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