Well the swap is not going anywhere near as easy as first appeared. The 70 455 mounts cannot be used based on position and design. They are not even close in resembling the Olds mounts from 76 as on my Cutlass. I picked up a set for mid 70's Olds which at this point appears will work. I will have to eliminate the eshaust manifolds and cross over system as this prevents the motor from dropping down into the cradle where the mounts need to be. A friend is fabricating the bast plate for the mounts. Next I will have to order headers and will need to look at manual choke or a new carb due to heat riser no longer will be on the engine. I would not recomend this swap to anyone. As an Old's person I will be the first person to tell you that headers on a 455 is one of the most difficult hook up's there is.
Anyway between that and ordering a new exhaust system It will be a few more weeks before this is considered finished.
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