Slant *        6        Forum
Home Home Home
The Place to Go for Slant Six Info!
Click here to help support the Slant Six Forum!
It is currently Sat Apr 19, 2025 7:07 am

All times are UTC-07:00




Forum locked  This topic is locked, you cannot edit posts or make further replies.  [ 6 posts ] 
Author Message
PostPosted: Fri Sep 28, 2001 12:05 am 
I've gone through lots of articles, and still have questions I just need answered. I really want to build a big valve head, but I want to be posative i'm doing the right things. I have an '81 head all cleaned up and ready to go to the machine shop, but I'm not sure what to ask for! it'll be a basic street build with a little spice. I got a M.P. ...43 cam and napa lifter set, new chain and gears, A.T.C. cr8H converter, and a Transgo shift kit. She's a 79 super six setup, 2.76 8/14" , 3550#, 904, with 2 1/4' single (with cat)exhaust. I think a .060-.080" mill is probably in order ( Felpro printoseal gasket), the 3/8 guides are wasted, so there's no better time to press in the 11/32'ths. Now with the stupid questions. I have a ton of chevy valves and would really love to use them .Will The 1.72's clear the stock bore? If I have the exhaust seats cut to 1.5" is the head soft there? do I need new seats pressed in? Do I need intake seats cut, or put in? Am I better off having the spring seats cut for chev. springs, or buying 1.5" 11/32's retainers? Either this is way too complicated, or I just need to spend a lot more time at the machine shop. Also, M.P. discontinued the Distributor advance kit, what's a good solution? Is there anything I might be missing?
Thanks

Fourgasman@aol.com


Top
   
PostPosted: Fri Sep 28, 2001 9:29 am 
Quote:
: I've gone through lots of articles, and still
: have questions I just need answered. I
: really want to build a big valve head, but I
: want to be posative i'm doing the right
: things. I have an '81 head all cleaned up
: and ready to go to the machine shop, but I'm
: not sure what to ask for! it'll be a basic
: street build with a little spice. I got a
: M.P. ...43 cam and napa lifter set, new
: chain and gears, A.T.C. cr8H converter, and
: a Transgo shift kit. She's a 79 super six
: setup, 2.76 8/14" , 3550#, 904, with 2
: 1/4' single (with cat)exhaust. I think a
: .060-.080" mill is probably in order (
: Felpro printoseal gasket), the 3/8 guides
: are wasted, so there's no better time to
: press in the 11/32'ths. Now with the stupid
: questions. I have a ton of chevy valves and
: would really love to use them .Will The
: 1.72's clear the stock bore? If I have the
: exhaust seats cut to 1.5" is the head
: soft there? do I need new seats pressed in?
: Do I need intake seats cut, or put in? Am I
: better off having the spring seats cut for
: chev. springs, or buying 1.5" 11/32's
: retainers? Either this is way too
: complicated, or I just need to spend a lot
: more time at the machine shop. Also, M.P.
: discontinued the Distributor advance kit,
: what's a good solution? Is there anything I
: might be missing?
: Thanks


Gasman,

I would appreciate it if people would try the "search" function since I have answered this question a few times, but no problem, here it is:

1.72" SBC valves work great on intake w/no bore notch. 1.50" SBC valves also work great, but need about a 0.030" bore notch for clearance on a stock bore. On my 0.060"-over motor, I used no bore notch. The head strength is fine for both valves - plenty of meat. I have pressed in hardened EXH seats on all my heads for unleaded gas. I have had the spring seats cut and used SBC retainers, springs, seals, locks. A good machine shop can get the heights and such right. Make sure to blend the ports around the valve openings, or have them do it, AFTER having the seats cut/installed - flow increases here. I spent $400 and $500 on my two heads including all (new) parts and labor, except I did the port smoothing myself.

Don't know about distr. kit. I always just buy springs from the hardware store and cut/bend them to fit and get the advance curve I want.

Hope this helps, and happy building!

Lou


Top
   
PostPosted: Fri Sep 28, 2001 6:08 pm 
Quote:
: Gasman,
:
: Don't know about distr. kit. I always just buy
: springs from the hardware store and cut/bend
: them to fit and get the advance curve I
: want.
: Hope this helps, and happy building!
: Lou


Crane Cams has a good kit, # 99604 (Electronic) & 99605 for Points.
I never saw much difference in the 2 kits, except for the instruction sheets.
Here is the link to recurving instructions:
DD


Distributor Recurving


Top
   
PostPosted: Sat Sep 29, 2001 8:22 am 
Took the head into the machine shop friday, the machinist did a lot of looking at me funny. He did have a question I couldn't answer. What would be the best mill for my combo? I think .080 would put me at about 9.0:1 correct? would that remain mid grade octane friendly with the camshaft I chose?


Fourgasman@aol.com


Top
   
PostPosted: Sat Sep 29, 2001 5:17 pm 
Quote:
: Crane Cams has a good kit, # 99604 (Electronic)
: & 99605 for Points.
: I never saw much difference in the 2 kits,
: except for the instruction sheets.
: Here is the link to recurving instructions: DD


Are these kits available at major auto parts stores? I checked Crane Cams web site and they list kits for Chev and Ford only.

pmvdlaan@picusnet.com


Top
   
PostPosted: Sun Sep 30, 2001 12:55 am 
I just went to the local speed shop today and told the proprieter that I wanted a crane distributor kit # ..... He said, "I'm not going to have anything like that, but I can order it". It's on the way. Thanks for the instructions, Doc.

Fourgasman@aol.com


Top
   
Display posts from previous:  Sort by  
Forum locked  This topic is locked, you cannot edit posts or make further replies.  [ 6 posts ] 

All times are UTC-07:00


Who is online

Users browsing this forum: Bing [Bot] and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited