Holley is the only one that has spread bore TBI's. They don't list a 2x4 option for the spreadbore, but if you contact them, they may be able to produce that arrangement. The way that Sniper system is designed, I don't know if you'd be able to fit the two units in front of each other.
Sell the offy manifold and go with the new Kauffman Tradewind?
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-Jason
1969 Pontiac Firebird
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