confused about a drum/disc swap

[Hottrucks]

ok heres what I have and was woundering what the results are going to be...

I am looking at a 71 truck with disc I want to keep my cupped LCA from my 70 ( I know I need to swap the ball joint )


what else do I need from the 71

will it wided my wheel base how much?? (worried about fender lip clearance with my 8" rallies when I drop it)

Is there a stock 6 lug disc that will go on the 71 spindle?? or do I need to find new wheels and swap the rear axles??

I plan to pro street the truck in the near future so I don't want to start playing the tire/rim 5 or 6 lug game I have plenty of 6 lug 16 hole rallies and was planning to cut and widen one set for the rear....is the 71 axle narrower if i have to do the 5 lug thing??

[cdowns]

you also meed the 71 master cyl prop valve and brake lines

[Hottrucks]

I already have that and a booster to really bring my breaks out of the stone age

[Classic Heartbeat]

Our 6 lug disk brake rotor hub assemblies will fit the 71-72 spindles. If you are interested here is a link: http://www.classicheartbeat.com/67-7...suspension.htm WES

[Hottrucks]

thanx Wes

is the 71 rear axle the same width as my 70??

[bodyman9174]

Originally Posted by Classic Heartbeat

Our 6 lug disk brake rotor hub assemblies will fit the 71-72 spindles. If you are interested here is a link: http://www.classicheartbeat.com/67-7...suspension.htm WES

That seems like a pretty good site.. 254.00 for a complete front disc brake set up. wonder what shipping would be ?

[Hottrucks]

ok here s a list
71 uca
71 spindle
71 caliper
71 brake line..rubber
70 lca with 71 ball joint (because of the cup)
6 lug rotor

will add the poportioning valve and booster from the 71

this will add 1.5" to the front wheel trac

the rear will be hit or miss on the width...( my 70 is 58 1/2" flange to flange is the narrow or wide??)

thanx guys

[lolife99]

uh,... could be.
There is a lot if discussion regarding the 1970 (only) rear axle housing.
It is suppose to be the "transition year". I would say that 90% of the '70 housings are the narrower 63-70 version. But some members have found a '70 6-lug housing the same width as the wider ''71-'72 housings.

Your disc brake swap will add approximately 1.5" total, (.75 per side) to your front track width.
The wider 71-72 rearends are also 1.5" wider than the narrower 6-lug rear ends.

[lolife99]

You will also need the '71 upper a-arms or '71-'72 upper balljoints swapped into your '70 upper a-arms

[72BlckButy]

Hottrucks... you should be fine running a set of 8" wide ralleys upfront as I did until I had time to repaint/mount the 7" ralleys. I was running 235 75R15's on all four corners with a 4.5/6" drop without rubbing once.

[lolife99]

Are you adding drop spindles at this time?

[Hottrucks]

no I have no room for drop spindles ...with the cupped lowers my inner fenders only clear by 1/4"

I was running 235/75/15's till I blew the cords out of one the other day (did you know there is no pin at the 0 on the speedo)..since then I have moved my rear tires forward (255/70/15) I'm not sure they are going to clear the lip with the added width of the disc convertion??....This has me in a funky position right now...I don't want to buy 235's for the front since the 255's are new?? then if I end up changing to 5 lug wheels that will bring another wheel factor into it.....the big problem is I love my 16 hole rallies they fit the look of the truck and I'm working on a pair of 14" wide ones now that are 6 lug

Ahhhhhhhhhhhhhhh!!