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#21
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Quote:
Be right in your MPG sweet spot? GT |
#22
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Mike, what heads will you use?
I've got a (free) pair of 1974 #46's just sitting, and a pair of #11's here in Clementon. I'll be at Atco today for the finale. I've got a '71 GTO. It ran great with the 8.2:1 400 and 3.08 gears. I think about 17 mpg but just an estimate. It was no monster, but ran respectfully, chirped second with the t400 and Transgo shift kit quite easily. I eventually installed a muncie, and then a 464. For me, with the 4 speed, the 400 was more fun to drive. The 464 just blows the tires up, and i worry about breaking stuff. I'd bet the 464 would be more fun with the automatic. Last edited by F ROCK; 11-13-2022 at 09:16 AM. |
#23
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I've always thought 6X-4 heads with 4" crank in a 400 block would be an easy deal for a street engine. The chambers will allow a decent compression ratio. Just a great combo, my opinion...
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#24
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I am going to use my 6x heads that are on the 455 now. I had them milled to a 90cc camber, They have new valves and guides and mild home port work. They should put me at about 8.8 compression. Might mill them a little more to get me at 9-1 on the 400.
The heads work great on the 455 put me right at 10-1. Went 11.7's at 3900 lbs with them. I have a set of 46's with 96 cc chambers and 5C's with 101 cc chambers that I won't be using. |
#25
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If you are getting a rotating assy from Butler, I wonder how much more a 4" stroker would cost???
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
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