The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-25-2007, 09:57 AM   #1
Jimmi
Registered User
 
Join Date: Mar 2007
Location: Arizona
Posts: 13
Need some HEI Help

Howdy all, Working on my uncles 71 3/4 ton with a 402. I am trying to talk him in to buying an HEI. I am tired of adjusting points and dwell lol. I wondering if the big HEI CAP IN COIL will fit fire wall clearance? I know on my Chevelle I have the external coil. I can't seem to find them for sale. If the big cap will fit I will just co with that. Jim
Jimmi is offline   Reply With Quote
Old 03-25-2007, 10:12 AM   #2
3/4tonterror
Registered User
 
3/4tonterror's Avatar
 
Join Date: Dec 2006
Location: jaffrey,NH
Posts: 325
Re: Need some HEI Help

Yes it will fit with plenyt of clerance. I have HEI in my 2wd and 4wd, plenty of room.But less room in my 4wd.
3/4tonterror is offline   Reply With Quote
Old 03-25-2007, 10:43 AM   #3
Jimmi
Registered User
 
Join Date: Mar 2007
Location: Arizona
Posts: 13
Re: Need some HEI Help

Thanks for the advise! Jim
Jimmi is offline   Reply With Quote
Old 03-25-2007, 11:42 AM   #4
cdowns
Senior Member
 
cdowns's Avatar
 
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
Re: Need some HEI Help

if he wants to retain the original look/ pertronix makes a really nice billet hei that uses original size and type of cap and uses an external coil/not cheap at over $200 for the setup
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane

MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF

DONT BELIEVE EVERYTHING YOU THINK

TAKE MY ADVISE;I DON'T USE IT ANYWAY
cdowns is offline   Reply With Quote
Old 03-26-2007, 01:02 PM   #5
Bill72BB
Thats the Hillbilly way
 
Bill72BB's Avatar
 
Join Date: Jul 2001
Location: Torrance,Ca
Posts: 5,979
Re: Need some HEI Help

I have that setup no problem , Here are the spec some of us used to set up the HEI.
When I installed an H.E.I unit in my ( 402 engine) ; I had a distributor rebuild shop set the advance curves as per the GM factory manual. The specs are :- 0 degrees @ 930 RPM; 2 @ 1260 RPM; 16 @ 2400 RPM and 30 @ 4400 RPM. Vacuum advance specs are 0 degrees @ 8" hg and 20 degrees @ 17" h.g. Initial ignition timing is 8 degrees advance @ 600 RPM ( idle speed).
... Above specs are from GM 1971 Chevrolet Truck Service Manual.
... Another GM reference is the 'GM/AC/Delco Tune-up Specs Manual # SD-100. These specs call for a 10-13 degree centrifugal advance @ 2000 RPM and a total advance ( vacuum & centrifugal ) of 28 to 35 @ 2000 RPM...... When I installed my unit about 10 years ago; I used an adjustable timing lite and set the timing to 35 degrees @ 2000.........No problems and I am well satisfied with the engine performance.............
__________________
BILL
Torrance Calif 90504
Member DUF Club
Member Old Farts Club
72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts
tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion.


" If I knew I was going to live this long I would have taken better care of myself "
Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER....

Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,
Bill72BB is offline   Reply With Quote
Old 03-26-2007, 08:43 PM   #6
mnunn454
Registered User
 
mnunn454's Avatar
 
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
Re: Need some HEI Help

Large cap HEI fits in my 69 with a BBC.

One point though (no pun intended). The power wire to a points distrib is usually a resister wire that reduces voltage to keep from burning up the points. HEI needs a full 12 volts, so suggest you loose the resister wire if it's there.
__________________
69 C-10 SWB Fleetside 454/TH400 (For Sale)
http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12
70 El Camino 454 TH700
29 Model A 4-DR Sedan Deluxe
mnunn454 is offline   Reply With Quote
Old 03-26-2007, 09:32 PM   #7
Snew
Registered User
 
Join Date: Jun 2006
Location: Hillsboro, OR
Posts: 28
Re: Need some HEI Help

I did the same swap. I got my wire from Year one. It snapped right into the back of the fuse block and had the correct connector for the distributor on the other end. Really felt like a good job to me.
Snew is offline   Reply With Quote
Old 03-27-2007, 12:50 AM   #8
Bill72BB
Thats the Hillbilly way
 
Bill72BB's Avatar
 
Join Date: Jul 2001
Location: Torrance,Ca
Posts: 5,979
Re: Need some HEI Help

Just wanted to mention that the setup figures I posted were from GMC JIM ,one of the few members on this board older than me .
__________________
BILL
Torrance Calif 90504
Member DUF Club
Member Old Farts Club
72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts
tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion.


" If I knew I was going to live this long I would have taken better care of myself "
Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER....

Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

Last edited by Bill72BB; 03-27-2007 at 12:51 AM.
Bill72BB is offline   Reply With Quote
Old 03-27-2007, 01:02 AM   #9
timcos
Chief Honcho In Charge
 
timcos's Avatar
 
Join Date: Aug 2006
Location: Bentonville AR
Posts: 970
Re: Need some HEI Help

I did shave off thew rear 1/4 inch of my HEI cap...nothing but plastic shaping and fins.
__________________

1992 1500 4x4 Shortbed
1984 Ford F250 Supercab Longbed 6.9L Diesel
1972 K10 Cheyenne Super Fleetside Short Bed - 350 - A/C
1971 VW SuperBeetle
1960 Wife
1984 Son
1986 Son
1989 Son

Previous Trucks
1967 C10 SWB (1980-1981)
1971 C10 LWB (1998-2004)
timcos is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:00 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com