![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Jun 2014
Location: Princeton Kansas
Posts: 235
|
Engine swap choices 4x4 Hell
Hello, I am in the process of rebuilding my 1971 k20 from the frame up. I am wanting to go fuel injected because it will be a daily driver. I am not too concerned on gas mileage but it can help. Right now I'm looking between a 4bt, 6.0 Ls, and maybe even and 8.1 ls. The 4bt will get great mileage but I'm not sure how much it would cost to lay down some decent numbers like 250-300 hp and 450-500 ft. Lbs. the 6.0 and 8.1 will get about the same mileage but the 8.1 is a monster and I will probably keep it stock for a while. I will be going with an nv4500 transmission no matter what the choice is unless I get a deal with a nice transmission included.
|
![]() |
![]() |
![]() |
#2 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
|
Re: Engine swap choices 4x4 Hell
No swap is still a good option. 250-300 is easy with a 350. In 1970 the 350 was 250hp stock. Never experienced hell with that
__________________
"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 ~ |
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
|
Re: Engine swap choices 4x4 Hell
All of your suggestions are expensive FWIW. And big blocks into a 67-72 can be a hassle as well because of how far the motor sits back. The 4BT makes tons of torque but is heavy. And loud.
Dollar per dollar a 383 is the way to go if you are cheap like me. Plenty of support for GM TBI/TPI or even aftermarket injection. I'd be looking at GM's 383HT and a Q-jet since it seems to hit all the targets and should be warranties as well.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
![]() |
![]() |
![]() |
#4 | |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
|
Re: Engine swap choices 4x4 Hell
Quote:
|
|
![]() |
![]() |
![]() |
#5 | |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
|
Re: Engine swap choices 4x4 Hell
Quote:
__________________
Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
|
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
|
Re: Engine swap choices 4x4 Hell
After alot of though I decided to go 6.0 LQ4. There cheap and run for a very long time.
__________________
1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
![]() |
![]() |
![]() |
Bookmarks |
|
|