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Old 08-11-2014, 08:28 AM
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400 or 455 ?

Which one to build for a street cruiser? I have a 69 400 that will be at .040 and align bore at .20 . Or I have a 400 at standard bore that needs one of the main caps and more than likely need bore and align bore with cap/caps replaced? Not a drag car just a driver and fun .Will end up in 76 F/bird.Thanks for some input!

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Old 08-11-2014, 09:06 AM
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take all your stuff to a good machine shop and get it checked.Count out what the piggy bank allows you to do. A blue printed near stock engine is good. Use a modern technology roller cam and a good exhaust system and drive the wheels off the car
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Old 08-12-2014, 08:04 AM
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Originally Posted by f/bird View Post
Which one to build for a street cruiser? I have a 69 400 that will be at .040 and align bore at .20 . Or I have a 400 at standard bore that needs one of the main caps and more than likely need bore and align bore with cap/caps replaced? Not a drag car just a driver and fun .Will end up in 76 F/bird.Thanks for some input!
So where's the 455? Can't beat cubic inches and the Ponchos are externally identical.
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Old 08-12-2014, 09:14 PM
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talk to a pontiac engine shop

I suggest contacting a Pontiac engine shop with what you have, your performance goals and budget. Good luck.
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Old 08-12-2014, 10:07 PM
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For fun on the street go with the 455! You'll enjoy all of the torque it will make.

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Old 08-13-2014, 01:34 AM
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Great picture Bill. You remember the Gibson Boys gasser 4 speed Vega back in the late 70's? The motors were mine and I had a lot of wheel time, had a long standing rivalry with Steve D. in his Vega wagon, the Ill Eagle U. S. Male. Ahh, the good old days. Spent a lot of time on the rear bumper. This is at Alaska Raceway a couple of years ago before I moved out. I've run several Pontiacs in the past, I agree with the 455 for torque.
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Old 08-13-2014, 04:14 AM
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Originally Posted by f/bird View Post
have a 69 400 that will be at .040 and align bore at .20 . Or I have a 400 at standard bore that needs one of the main caps
. You said "400" and "400"...

. Use your 3rd engine, the 455 in perfect condition... LOL!
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Old 08-13-2014, 07:40 AM
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LOL ; YEP, It's a 455 at standard bore 71/72 . I maybe able to use the 6x4 heads from my 350 ? I have a set of 13's all ready redone that I was going to use on the 400 .
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Old 08-13-2014, 09:48 PM
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455 all the way.. I had that in my 74 f-bird with 4:11's.. was a fun car
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Old 08-13-2014, 10:31 PM
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455..all day.

Go for the torque, way more fun.
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