Anyone installed Mark Williams billet caps on 8 3/4?? - Moparts Forums

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Anyone installed Mark Williams billet caps on 8 3/4?? #890071 12/28/10 11:49 AM 12/28/10 11:49 AM
Joined: Jun 2010 Posts: 80 Fredonia,NY W wafflebatter OP member
wafflebatter OP member W Joined: Jun 2010 Posts: 80 Fredonia,NY	looking to get Mark Williams 8 3/4 billet caps and adjusters, the web site says easy install with simple machining, what is the simple machining?

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: wafflebatter] #890072 12/28/10 11:58 AM 12/28/10 11:58 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Milling

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: MR_P_BODY] #890073 12/28/10 12:35 PM 12/28/10 12:35 PM
Joined: Jun 2010 Posts: 80 Fredonia,NY W wafflebatter OP member
wafflebatter OP member W Joined: Jun 2010 Posts: 80 Fredonia,NY	what do you have to mill? the surface of the cap to the case?

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: wafflebatter] #890074 12/28/10 12:45 PM 12/28/10 12:45 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	The mating surface of the cap... you can take it to a rear end shop to have them set it up

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: MR_P_BODY] #890075 12/28/10 01:00 PM 12/28/10 01:00 PM
Joined: Jun 2010 Posts: 80 Fredonia,NY W wafflebatter OP member
wafflebatter OP member W Joined: Jun 2010 Posts: 80 Fredonia,NY	ok I understand, thanks. I think these may be a wise investment, I know there was a thread on this, but what do you think the stock caps can handle? considering my roadster only weighs approx. 1900 lbs. with 600 hp, it is pretty easy on parts, but if it is not worth spending $300 on that, I could put the cash to use somewhere else 6382305-nyirp009.jpg (65 downloads)

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: wafflebatter] #890076 12/28/10 01:06 PM 12/28/10 01:06 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: ok I understand, thanks. I think these may be a wise investment, I know there was a thread on this, but what do you think the stock caps can handle? considering my roadster only weighs approx. 1900 lbs. with 600 hp, it is pretty easy on parts, but if it is not worth spending $300 on that, I could put the cash to use somewhere else I ran a stock cap 8 3/4 for a long time in my car 2400# with me but I finally broke the caps... this was with about 600hp and low 1.20s 60'... I changed to the alum center after that... if I didnt go with the alum center I would have gone with the good caps.... also a back brace helps alot

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: wafflebatter] #890077 12/28/10 01:57 PM 12/28/10 01:57 PM
Joined: Jan 2003 Posts: 74,992 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,992 U.S.S.A.	You will more than likely be fine with just changing the ring gear side cap, that one sees the highest loading. An engine shop can fit the cap, take the empty case with the cap installed to the shop , they can measure the hole size , swap on the new cap and see how much larger the hole is and cut the cap to bring it back to spec. I vaguely remember having to take close to .125 off the one I had done, the shop did the major cut in a bridgeport and used a rod cap grinder to finish the job .

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: JohnRR] #890078 12/28/10 04:01 PM 12/28/10 04:01 PM
Joined: Jul 2010 Posts: 417 reynoldsburg,ohio poppaj mopar
poppaj mopar Joined: Jul 2010 Posts: 417 reynoldsburg,ohio	I had a set in my 8-3/4 in the coronet. Still blew the ring and pinion. Housing flex causes the problems. If you are over 3000# and have 600+hp consider a Dana 60 or a 9". 6382633-coronet999.jpg (50 downloads) AA/NSS 65'Coronet "Whompin Wedge" Pop & Son Performance 557" B-1 power John Holt Chassis

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: poppaj] #890079 12/28/10 04:04 PM 12/28/10 04:04 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I had a set in my 8-3/4 in the coronet. Still blew the ring and pinion. Housing flex causes the problems. If you are over 3000# and have 600+hp consider a Dana 60 or a 9". The car weighs 1900#

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: poppaj] #890080 12/28/10 04:27 PM 12/28/10 04:27 PM
Joined: Jun 2010 Posts: 80 Fredonia,NY W wafflebatter OP member
wafflebatter OP member W Joined: Jun 2010 Posts: 80 Fredonia,NY	I am in the process of installing a Moser back brace right now, I figured as light as the car is that would be all I needed, but saw these caps and thought it would be more insurance, but now I see Moser makes a nodular 489 case with billet adjusters for $275, it lists up to 500 hp though, anyone have any luck with one of these? 6382676-nyirp009.jpg (66 downloads)

Re: Anyone installed Mark Williams billet caps on 8 3/4?? [Re: wafflebatter] #890081 12/28/10 05:29 PM 12/28/10 05:29 PM
Joined: Oct 2005 Posts: 218 id usa 4 4spdfury enthusiast
4spdfury enthusiast 4 Joined: Oct 2005 Posts: 218 id usa	I have a aftermarket case with markwilliams billet caps on both sides. Also has a mw steel spool and 4:56 richmond pro gears with a billet yoke already setup and never used. I would sell it cheaper than you could buy all the parts. Pm me if you are interested.

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