1966 Cutlass 455/400 swap

Old Jul 25, 2014 | 05:10 PM
  #1  
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1966 Cutlass 455/400 swap

Just finished a long process ( only a day or two at a time ) of a 330/Jetaway to 455/400 swap. Easy deal with all the right stuff. Flowtech headers fit OK except for steering shaft, upper A frame rear pass side and brake distribution block. Driveshaft professionally cut and balanced. Trans crossmember moved rearward. Shift and throttle linkage were modified and work perfectly. Went with a Champion 2 core radiator and it dropped right in and runs cool. Will be driving the car to work out some small details.
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Old Jul 25, 2014 | 05:22 PM
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Glad to hear it went well!
How are the header while putting it in reverse ? Do they bang or hit against anything ?

Also what mods were done to the shifting linkage ?
Old Jul 25, 2014 | 05:32 PM
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The left side header rubs on the steering shaft. I had "dented" the two center tubes prior but still not enough. New motor mounts are holding the motor pretty good but i can feel the engine in the steering wheel. The left header will come off for further "modification" or I will get a different brand. The shift linkage only needed to be straightened so it would clear everything. The ear for the trans and the cross shaft bolted right on the the TH400 like it was made for it. Just some bending and tweaking so it cleared everything through the shift range. The indicator on the dash just is a little off between L-2. The throttle bolted to the Edelbrock carb and manifold by disconnecting the ball and socket and drilling a new hole in the upper part of the linkage and a new ball stud was added on the opposite side. works perfect.
Old Jul 25, 2014 | 05:51 PM
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OAI bezels are in the bumper, where's the rest?
Old Jul 26, 2014 | 04:26 AM
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I wish that was my W30.......My car is same color and in no where that nice a shape.
Old Jul 26, 2014 | 05:57 AM
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it is one of the easiest and cost effective swaps for some extra HP. It really gives new meaning to the fun pedal.
Old Jul 26, 2014 | 06:56 AM
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Did the same swap a few years back. Used "W" and "Z" exhaust mainfolds, new replacement 330 motor mounts and all the stuff off the front of the 330, a Quadrajet, a driveshaft I had in my stash that was the right length. As you did I moved the cross member back. Had to redo my ebrake cable. But no mods to linkage for shift or accelerator. Check out my album for engine pictures.


Have fun,
Old Aug 3, 2014 | 12:27 PM
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Finishing the details. Fixed the fuel issue, not swap related, dry rotted and split 48 year old fuel supply hose at the fuel tank. Removed the left header and found that not only was the steering shaft making contact but the bottom of the tube from the six hole was resting on the crossmember leaving me a nice reference point for a new "clearance adjustment" No more contact on either side and no more fuel starvation. BIG improvement. I forgot how much I missed all that torque, the thing is a tire melter and has a great bump to it at idle. Not a lot of hood clearance with the Performer intake and Thunder series carb but a hugger base plate with a 2"x 14" air filter under the stock air cleaner top looks very clean and it breathes all the way around. Next, Positraction.
Old Aug 3, 2014 | 04:45 PM
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Pictures, lets see it
Old Aug 5, 2014 | 04:40 AM
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Lets see if this works, all cleaned up and ready to roll.
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