Suggestions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ridin98ci · 11-22-2007, 12:59 PM

I am trading my 69 c-20 for a 70 GMC shorty w/ a 6cyl and 3 spd......whats the best tune up for these 6's for gas milage? Is there an easy drop in hei? Any help is appreciated.
James

jackyl9999 · 11-22-2007, 01:30 PM

Gmc looks good. But im partial to them. Im not familar with the sixes. sorry.

ridin98ci · 11-23-2007, 01:14 AM

Thanks. The primer is hiding alot but sure seems like a decent lil driver. I go pick it up tommorow the p/o said he was getting 14-16mpg I sure hope thats right!!! HAHAHA
James

FRENCHBLUE72 · 11-23-2007, 01:53 AM

The p.o. must be crazy that gmc looks great..

krue · 11-23-2007, 02:34 AM

HEI off of a later 250 will work.

retodd7711 · 11-23-2007, 06:05 AM

HEI is the best improvement for these motors. Smoother running better acceleration. Less than $100.00. I think 1976 was the first year for them. Easily found at parts store

**special-K** · 11-23-2007, 06:09 AM

Check the parts section for a factory HEI.Good ole Monojet carb.I think a header and duals with free-flowing mufflers will help,too.Kinda goes with those slots

.

6470chevy · 11-25-2007, 08:31 AM

hei 6 cyl dist. will work of of any motor (6cyl) rom 70's to 80"s I get them from pull-a-part for about $25 each coil and all cheap easy mod just make sure to run a relay to keep the 12v feed while running

ChevLoRay · 11-25-2007, 08:37 AM

Clifford Research is a source for 6-cylinder performance stuff. Headers, intakes, etc.

My brother-in-law said his 67 6-cylinder got 9 MPG. I hope you can do better. Of course, his was nearly new, at the time.

11-22-2007, 12:59 PM	#1
ridin98ci Registered User Join Date: Oct 2007 Location: Monticello IL Posts: 29	Suggestions I am trading my 69 c-20 for a 70 GMC shorty w/ a 6cyl and 3 spd......whats the best tune up for these 6's for gas milage? Is there an easy drop in hei? Any help is appreciated. James Attached Images __________________ Im gonna slam a 3/4 ton....I may be nuts!!!

11-22-2007, 01:30 PM	#2
jackyl9999 Registered User Join Date: Feb 2003 Location: Paragould, Ar Posts: 571	Re: Suggestions Gmc looks good. But im partial to them. Im not familar with the sixes. sorry. __________________ 1970 Gmc Grande Sierra Swb 2wd LSX (LQ4/4L80e) 1990 K1500 Daily

11-23-2007, 01:14 AM	#3
ridin98ci Registered User Join Date: Oct 2007 Location: Monticello IL Posts: 29	Re: Suggestions Thanks. The primer is hiding alot but sure seems like a decent lil driver. I go pick it up tommorow the p/o said he was getting 14-16mpg I sure hope thats right!!! HAHAHA James __________________ Im gonna slam a 3/4 ton....I may be nuts!!!

11-23-2007, 01:53 AM	#4
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Re: Suggestions The p.o. must be crazy that gmc looks great.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

11-23-2007, 02:34 AM	#5
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: Suggestions HEI off of a later 250 will work. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

11-23-2007, 06:05 AM	#6
retodd7711 chrome makes it go FASTER! Join Date: Feb 2007 Location: Cleveland Tennessee Posts: 2,884	Re: Suggestions HEI is the best improvement for these motors. Smoother running better acceleration. Less than $100.00. I think 1976 was the first year for them. Easily found at parts store __________________ She can't cook and she won't clean. But she looks good in a skirt and she brings me beer. She can stay for now. EDIT:: But she left me anyway, So forget her. 1962 GMC Stepside V6 4 speed My rolling resto thread http://67-72chevytrucks.com/vboard/s...d.php?t=324226 My old farm truck http://67-72chevytrucks.com/vboard/s...=1#post3465005

11-23-2007, 06:09 AM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Suggestions Check the parts section for a factory HEI.Good ole Monojet carb.I think a header and duals with free-flowing mufflers will help,too.Kinda goes with those slots. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-25-2007, 08:31 AM	#8
6470chevy Registered User Join Date: Dec 2006 Location: tn Posts: 14	Re: Suggestions hei 6 cyl dist. will work of of any motor (6cyl) rom 70's to 80"s I get them from pull-a-part for about $25 each coil and all cheap easy mod just make sure to run a relay to keep the 12v feed while running __________________ 70 lwb (my work in progress) 64 biscayne 250 I6 (5 year old son's) 68 galaxie 500 fastback 390bb (6 year old son's) looking for newborn daughter's (???)

11-25-2007, 08:37 AM	#9
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Suggestions Clifford Research is a source for 6-cylinder performance stuff. Headers, intakes, etc. My brother-in-law said his 67 6-cylinder got 9 MPG. I hope you can do better. Of course, his was nearly new, at the time. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

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