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Old 10-15-2009, 10:28 AM
Rollin1966Belair's Avatar
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355 build would like some suggestions

I have a 1966 belair with a powerglide trans. that has a 350 in it that has spun a bearing so i was thinking about getting it bored .030 i understand the mechanics of how everything works but i was wondering to make it a strong 355 do i need to change the crank size,rods, and what kinds of pistons and cam would be suitable for everyday driving. I want a strong beefy sound and i would like alot of bottom end torque lol yeah i like to smoke em up. Also should i use the stock vortec heads or should i invest in a better pair. Thanks any help will be greatly appreciated and i will be posting a youtuble link after i get er dun Money is an issue so trying to keep the parts down to a repectable price would b nice but if it cant be avoided the ol lady is just gonna have to cancel x-mas

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Old 10-15-2009, 03:22 PM
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I would do a stock rebuild with 8.75 to 9:1 cr and use a cam with 205 to 210 degrees duration at 0.050" with 6 to 8 more on the exhaust (due to the fact vortecs have weak exhaust ports). Keeping lift under 0.450" with stock vortec heads.

Use long tube headers and dual 2-1/4 to 2-1/2 exhaust with a H cross-over pipe and a set of dynomax super turbos.

Your biggest bang for the buck will be to change to a th350 transmission. glides need lots of power to move a car quick.
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Old 10-18-2009, 08:28 PM
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1.I want a strong beefy sound

2. I would like alot of bottom end torque

It's tough to get this combination, if you're talking about a strong sounding lopey idle. The more compression you build into the motor, the stronger it will sound, but you have to use more cam to get there. It's a balancing act because you have to use a cam with more duration and extended intake closing point to match up to the increased compression. The longer the cam, the less bottom end the motor has, so then you have to use more gear and a looser converter to get past the slushy bottom end. The more cam you have to use, the more the motor turns into a race motor and the less tractable it is for a street motor.

454C10's reply was right on the money.
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