For what it is worth, I ran the 1.7 RR's on a set of Edelbrock Performer heads on two differant stock blocks with no problems... Let us know what you decide and how it works out.
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92GT all the free stuff and a few bolt-ons, lowered with Ebiach's and Koni's, Kenny Brown subframe connectors, lower G-brace and jacking rails. BBK upper and lower control arms, polyurethane bushings all around and Ken Bell blower, ram-air, 80mm mass air, etc.