'88 350 questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68chevystepside · 12-06-2010, 03:12 AM

I have a 68 chevy stepside with an inline six that i am planning to swap out for a 350. i found one out of a '88 1500 which is what i want becuase it has a serpentine belt. i want to convert the 350 to carb, what else do i need to do besides changing the distributor and the intake manifold? will motor mounts from the 72 chevy c10 bolt up or will there be modification required? what will i need to have functioning power steering? will 72 chevy c10 parts work for that? would i be able to swap the pulley for the 72 p/s pump to work with the sepentine belt?? later on down the line i want to build this 350 to a 383 and i want to know what transmission would be better to go with, a 700R or the Turbo 400 and what year/ what vehicle do you guys recommend for the transmission. also will the stock rear diff be ok to use or should i replace that also?? if so out of what year/what vehicle? Thanks in advance.

gastrader35 · 12-06-2010, 03:42 AM

The motor mounts will bolt up from the 72 no mods. For the power steering pulley will not work but you could use the pump from the 88 and the line fitting for that pump use some high pressure hose and good clamps on your 72 lines.

Jacfourteen · 12-06-2010, 03:51 AM

All that is necessary to convert to carb is the carb and manifold. The engine will bolt right into place using small block towers and mounts from a 67-72 truck. What tranny do you have now? If you have a 4 speed now, when you convert it to auto you will have to get rid of the crossmember that the bellhousing sits on now and get an auto tranny crossmember. If you have auto then you will just have to move your crossmember some. I'm not sure on what is needed if you currently have 3 OTT. If your going to the trouble of a tranny swap I would suggest going for the OD, either 700r4 or 200r4. The rear end you have now will be fine, no need to swap it unless you are wanting different ratio or something. Here is a thread that is going now that is similar to yours, you should look through it to see if it answers any other q's you might have. http://67-72chevytrucks.com/vboard/s...d.php?t=434031. Hope this helps get you started.

foamypirate · 12-06-2010, 03:57 AM

There is one small thing some are forgetting about when converting to carb, and that is the fact that an 88' block may not have the boss for a mechanical fuel pump. You may need to install a low pressure electric fuel pump to complete the conversion.

68chevystepside · 12-06-2010, 11:28 PM

Quote:

Originally Posted by Jacfourteen

All that is necessary to convert to carb is the carb and manifold. The engine will bolt right into place using small block towers and mounts from a 67-72 truck. What tranny do you have now? If you have a 4 speed now, when you convert it to auto you will have to get rid of the crossmember that the bellhousing sits on now and get an auto tranny crossmember. If you have auto then you will just have to move your crossmember some. I'm not sure on what is needed if you currently have 3 OTT. If your going to the trouble of a tranny swap I would suggest going for the OD, either 700r4 or 200r4. The rear end you have now will be fine, no need to swap it unless you are wanting different ratio or something. Here is a thread that is going now that is similar to yours, you should look through it to see if it answers any other q's you might have. http://67-72chevytrucks.com/vboard/s...d.php?t=434031. Hope this helps get you started.

what year/ vehicle should i get the 700r transmission from??

Jacfourteen · 12-07-2010, 03:08 AM

Quote:

Originally Posted by 68chevystepside

what year/ vehicle should i get the 700r transmission from??

Sorry, I can't help you there. I've never messed with autos that much, I try to stick with manuals. I'm sure someone else will chime in though.

12-06-2010, 03:12 AM	#1
68chevystepside Registered User Join Date: Nov 2007 Location: La Puente, CA Posts: 18	'88 350 questions I have a 68 chevy stepside with an inline six that i am planning to swap out for a 350. i found one out of a '88 1500 which is what i want becuase it has a serpentine belt. i want to convert the 350 to carb, what else do i need to do besides changing the distributor and the intake manifold? will motor mounts from the 72 chevy c10 bolt up or will there be modification required? what will i need to have functioning power steering? will 72 chevy c10 parts work for that? would i be able to swap the pulley for the 72 p/s pump to work with the sepentine belt?? later on down the line i want to build this 350 to a 383 and i want to know what transmission would be better to go with, a 700R or the Turbo 400 and what year/ what vehicle do you guys recommend for the transmission. also will the stock rear diff be ok to use or should i replace that also?? if so out of what year/what vehicle? Thanks in advance. Last edited by 68chevystepside; 12-06-2010 at 03:39 AM.

12-06-2010, 03:42 AM	#2
gastrader35 HOARDING SPECIALIST Join Date: Sep 2009 Location: SOUTH CHARLESTON OHIO Posts: 124	Re: '88 350 questions The motor mounts will bolt up from the 72 no mods. For the power steering pulley will not work but you could use the pump from the 88 and the line fitting for that pump use some high pressure hose and good clamps on your 72 lines. __________________ NEW PROJECT 67 C/10 SHORT FLEET

12-06-2010, 03:51 AM	#3
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: '88 350 questions All that is necessary to convert to carb is the carb and manifold. The engine will bolt right into place using small block towers and mounts from a 67-72 truck. What tranny do you have now? If you have a 4 speed now, when you convert it to auto you will have to get rid of the crossmember that the bellhousing sits on now and get an auto tranny crossmember. If you have auto then you will just have to move your crossmember some. I'm not sure on what is needed if you currently have 3 OTT. If your going to the trouble of a tranny swap I would suggest going for the OD, either 700r4 or 200r4. The rear end you have now will be fine, no need to swap it unless you are wanting different ratio or something. Here is a thread that is going now that is similar to yours, you should look through it to see if it answers any other q's you might have. http://67-72chevytrucks.com/vboard/s...d.php?t=434031. Hope this helps get you started. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

12-06-2010, 03:57 AM	#4
foamypirate Registered User Join Date: Apr 2009 Location: Pflugerville, TX Posts: 594	Re: '88 350 questions There is one small thing some are forgetting about when converting to carb, and that is the fact that an 88' block may not have the boss for a mechanical fuel pump. You may need to install a low pressure electric fuel pump to complete the conversion.



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