I have the exact same combo in my 72 nova , and starting a ls1 t56 swap in my sons 71 Nova SS, yes you have to cut the tunnel out. Do not be scared, its just sheet metal , that is why they make welders and plasma cutters..On my son's car we are working on a swap the uses almost everything including the rack and pinion out of a 98 - 02 fbody. My goals is to have all the "hard parts" be a 100% bolt in, motor , trans and brakes are a snap , but the rack is going to require some more thought.
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