I need converter/gear suggestions PLEASE - Team Camaro Tech
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post #1 of 9 (permalink) Old Jan 7th, 01, 04:36 AM Thread Starter
 
Join Date: Dec 2000
Location: Charlotte,NC 28216
Posts: 16
Question

Guys,
Would like some opinions on a good gear and
converter. Car is a 75 with 402, 9:1 oval port w/2.06/1.725, Edelbrock performer RPM
intake, carb, and supposedly the performer cam which is 114 LSA 218/228 @.050" .500/.500
Have 1 3/4 headers and figure car is about 3800 with me in it. It will be a weekend cruiser which I would like to have fun with.
Has a 3.08 one legger and Sag 4. Want to replace with a posi and TH400. I need some gear and converter suggestions. I'm thinking
3.23(10 Bolt) and a TCI 2400 converter. Tires will be 26". Nitrous is in future plans
as maybe 427 crank and pp heads.
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post #2 of 9 (permalink) Old Jan 7th, 01, 06:21 AM
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Freddie
 
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Location: Central City, Ky.
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I think I would use about a 2000 converter and about a 3.73 gear with a Eaton posi. The 427 crank is the same stroke as your 402 crank, so you wouldn't gain anything there.

------------------
'69 RS/SS396 pro street
427/4spd/9"
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post #3 of 9 (permalink) Old Jan 8th, 01, 01:55 PM Thread Starter
 
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Location: Charlotte,NC 28216
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Smile

Big Gear Head:
Thanks for the advice. Maybe I can save a little on the converter by buying a BM Holeshot with the lowest rating (2200?) and
some new gears. Is it maybe that I can use my
crank/rods but 427 pistons with an overbore?
I read in "how to your Rat motor" book by SA
Designs somrething that you can make a 427 out of a 396. Any advice/experience?
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post #4 of 9 (permalink) Old Jan 9th, 01, 01:52 PM
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Freddie
 
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Location: Central City, Ky.
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You will need another block to make a 427. The 454 and 427 share the same bore so either one will work. The cylinders in your 402 are too thin to bore .125" to make the 427 from it. The crank and rods will work but will need to be reballanced for the heavier 427 pistons. This is how I built mine except I used a bowtie block.

------------------
'69 RS/SS396 pro street
427/4spd/9"
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post #5 of 9 (permalink) Old Jan 9th, 01, 03:14 PM
 
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Question

Big gear,

Was it just the early 396's that would bore to 4.25"?? pdq67



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post #6 of 9 (permalink) Old Jan 9th, 01, 06:11 PM
 
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Location: Fernley, NV, US
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What about that 10 bolt. Wouldn't it be wise to go to a 12 bolt or a 9 inch? If you plan on running nitrous i would swap it out. Just my humble opinion, I could be wrong.
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post #7 of 9 (permalink) Old Jan 10th, 01, 08:55 AM
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Location: Houston, Texas
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The 8.5" 10 bolt will be fine. These rears will take alot of abuse. The old 8.2 10 bolts are the weak ones. I would use a 3.42 or 3.73 gear with a 2200 to 2400 converter.
Stephen

[This message has been edited by squarles (edited 01-10-2001).]
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post #8 of 9 (permalink) Old Jan 10th, 01, 01:24 PM Thread Starter
 
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Location: Charlotte,NC 28216
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Lightbulb

I would like to correct myself on the 402. I actually have a 66 ss chevelle 396 short block which is supposedly .030" over. The heads are early 71/72 402 2.06/1.725 ovals. I do remember reading that the 396 would take a massive .125" overbore. I know that sometimes its best not to believe everything that you read, so any one know for sure? Thanks.

------------------
mark mccollum
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post #9 of 9 (permalink) Old Jan 10th, 01, 05:11 PM
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Freddie
 
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Location: Central City, Ky.
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If you think you may have a thick wall block you can check it by knocking out the center freeze plug and sticking a standard wood pincil between the cylinders. If the pincil will go between them they are not the thick ones. If the pincil will not go between them you may be able to bore to 4.250 but have it sonic checked first.

------------------
'69 RS/SS396 pro street
427/4spd/9"
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