what motor to drop in? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roadking · 01-02-2004, 12:24 PM

i have 71 6 banger starting to smoke alittle, thinking about getting a valve job done but i have chance to buy a used v8 motor and tranny out of a 82 pu, ( tow lot left over)have not figured ouy what block it is yet but runs well and does not smoke( going to do a compression cheak today) questions are will this be a bolt right motor and when did all the computer crap start effecting chevy motors. oh yea 500.00 for motor and tranny

bigvinnie · 01-02-2004, 02:13 PM

Should be a bolt-in operation, you'll want to get the motor mounts and towers from the donor also... might wanna get the driveshaft also, as well as the speedo cable and oil pressure sending line if you have the stock oil pressure gauge, as the 6 cylinder one will be too long....

is your current trans different than the one with the V8...??? If so, there are other considerations...

dubie · 01-02-2004, 02:21 PM

I just swapped my 6 banger out for a 350 out of an 82 as well, and it drops right in place IF you put it in the Inline 6 location. If not then you will have to do some tower swapping and possibly change your tranny X member, depending on what tranny you use

Paul72 · 01-02-2004, 02:44 PM

Computers came out on trucks in '88. Although in '87 they had a TBI set up.

roadking · 01-02-2004, 08:21 PM

thanks for info, i have a powerglide tranny in now , i hope the motors a 350

Tx Firefighter · 01-02-2004, 11:00 PM

The later model engine won't have an oil pressure sending line. They went to electric oil pressure guages in 78. Your 6 cylinder line might have a coupling about a foot from the end where you can remove the last foot of it. If not, just gently wind up the extra slack in a loop.

Use the 6 cylinder mounts and it'll go right in.

You'll need to fab up a longer throttle rod.

Bolt the flywheel off of your 6 onto the small block and use the 6 cylinder starter. It will bolt right to the SBC too.

*Randy70C-10* · 01-02-2004, 11:38 PM

roadking- have you seen mine yet? http://67-72chevytrucks.com/vboard/s...threadid=83622

Longhorn Man · 01-03-2004, 01:31 AM

If your inline is a 292, then you'll need an engine tower, if it is a 250, then you're OK.

01-02-2004, 12:24 PM	#1
roadking Registered User Join Date: Nov 2003 Location: kc Posts: 229	what motor to drop in? i have 71 6 banger starting to smoke alittle, thinking about getting a valve job done but i have chance to buy a used v8 motor and tranny out of a 82 pu, ( tow lot left over)have not figured ouy what block it is yet but runs well and does not smoke( going to do a compression cheak today) questions are will this be a bolt right motor and when did all the computer crap start effecting chevy motors. oh yea 500.00 for motor and tranny

01-02-2004, 02:13 PM	#2
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	Should be a bolt-in operation, you'll want to get the motor mounts and towers from the donor also... might wanna get the driveshaft also, as well as the speedo cable and oil pressure sending line if you have the stock oil pressure gauge, as the 6 cylinder one will be too long.... is your current trans different than the one with the V8...??? If so, there are other considerations... __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

01-02-2004, 02:21 PM	#3
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	I just swapped my 6 banger out for a 350 out of an 82 as well, and it drops right in place IF you put it in the Inline 6 location. If not then you will have to do some tower swapping and possibly change your tranny X member, depending on what tranny you use __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

01-02-2004, 02:44 PM	#4
Paul72 Registered User Join Date: Sep 2003 Location: Waterloo, IA Posts: 1,147	Computers came out on trucks in '88. Although in '87 they had a TBI set up. __________________ '72 Chevy K20 - 383/4sp/205 - SOLD after 41 years in the family Next project - K/5 Tahoe (71 Blazer on 99 Tahoe chassis) Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=789958

01-02-2004, 08:21 PM	#5
roadking Registered User Join Date: Nov 2003 Location: kc Posts: 229	thanks for info, i have a powerglide tranny in now , i hope the motors a 350 Last edited by roadking; 01-02-2004 at 08:24 PM.

01-02-2004, 11:00 PM	#6
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	The later model engine won't have an oil pressure sending line. They went to electric oil pressure guages in 78. Your 6 cylinder line might have a coupling about a foot from the end where you can remove the last foot of it. If not, just gently wind up the extra slack in a loop. Use the 6 cylinder mounts and it'll go right in. You'll need to fab up a longer throttle rod. Bolt the flywheel off of your 6 onto the small block and use the 6 cylinder starter. It will bolt right to the SBC too. __________________ I'm on the Instagram- @Gearhead_Kevin

01-02-2004, 11:38 PM	#7
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	roadking- have you seen mine yet? http://67-72chevytrucks.com/vboard/s...threadid=83622

01-03-2004, 01:31 AM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	If your inline is a 292, then you'll need an engine tower, if it is a 250, then you're OK.



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