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PostPosted: Tue Jul 25, 2017 5:36 pm 
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1 BBL (New)

Joined: Sat Nov 19, 2016 3:43 am
Posts: 1
Location: Indiana
Car Model*:
It's "Stupid Question Time," and I thank you for your patience with me!

I'm rebuilding a '67 Dart 270. It has 9" drums all around with 13" wheels mounted on 5x4" SBP. Since I can't find quality 13" tires, and because using 9" drums on a modern highway is a recipe for death, I want to upgrade to disc brakes all around. I think it would be wise to also upgrade to 15" wheels.

I assume I will have to go from 5x4" SBP to 5x4.5" BBP for 15" wheels.

Am I able to do this while keeping my 7 1/4" rear axle? Or ought I go junkyard diving for a larger rear axle and a driveshaft?

(FWIW, I am restoring the 225 slant and the A904 transmission in the Dart to factory specs, if that makes a difference in your advice.)

Thanks, in advance!


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PostPosted: Tue Jul 25, 2017 6:06 pm 
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TBI Slant 6

Joined: Thu Jun 04, 2015 6:19 pm
Posts: 123
Location: Florida
Car Model*:
I have purchased 5x4 15"x 7" and 6" steel wheels. They are available still I believe


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PostPosted: Tue Jul 25, 2017 9:00 pm 
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Supercharged
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Joined: Sun Nov 03, 2002 9:20 pm
Posts: 11723
Location: Fircrest, WA
Car Model*:
They made 7 1/4 axles with the larger 5x4.5 bolt pattern, but if you are swapping axles, why stay with that inferior design? These days the best bang for your buck is likely the swap to the Ford Explorer axle. That swap has been covered elsewhere on this site, but it gets you a peppier gear ratio, disc brakes, and the 5x4.5 bolt pattern all in one go.


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PostPosted: Fri Aug 04, 2017 5:03 pm 
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TBI Slant 6

Joined: Sat Mar 19, 2016 7:25 pm
Posts: 108
Location: SW PA
Car Model*:
Rick@Layson's advertised a powder-coated set of SBP 15x6" rallye's over on
FABO a while ago, not sure if they sold yet, but I didn't think the price was
bad for them. FWIW, I hauled My '69 Dart Custom w/a smallblock down
from ~100mph at the strip and hit the first turnaround w/o a problem. That
still had the 9" frt. drums on it. Unless You have the car loaded down for a
trip or expect to stop hard repeatedly, they work OK serviced & adj. correctly.
That said, I'd never discourage any improvements, just an FYI. Just keep in
mind that better tires and brakes also put more load & stress on the
suspension, the bushings and joints better be good, or there will be unsafe
amounts of movement when turning &/or stopping hard.


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PostPosted: Sat Aug 05, 2017 11:30 am 
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Supercharged
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Joined: Thu Jan 27, 2005 8:32 pm
Posts: 6985
Location: SW Washington
Car Model*:
Here's every 15" wheel with the 5 on 4" pattern that Summit Racing lists:
https://www.summitracing.com/search/dep ... 4294920795

_________________
Joshua Skinner
Car nut, telecom tech, tool using mammal
1954 Dodge C1-B8, 241 poly-head V8


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