Hello Gentleman, Newbie here, I will soon be purchasing the L31 (Part [HASHTAG]#12530283[/HASHTAG]) from Jegs that I want to convert to using a carburetor. What do I need to do for the conversion ? What else do I need to purchase ? Also, will this be fine with my TH350 Trans ? Thanks Guys
Those were just originally TBI truck engines, right? Intake, distributor, carb. Your trans will bolt up fine. I don't know what you have for an engine now, but ofcourse you'll need all accessory brackets and such. Were those truck serpentine belted?..If so, you need to make sure (assuming you'll run V-belts) that you don't ask for a water pump from those years, as they would be reverse rotation (if serp belt used).
that motor has a one piece rear main seal , so you will need the appropriate flexplate the intake manifold will have to be the later type where all the bolts go straight down , not at an angle like the earlier motors
The description says based on '86-'90 block, so I think you are correct...a quick call to Jegs would confirm/deny it.
You may you may not. The original production blocks from 86 to the early 90's have the fuel pump pushrod machined in the block and have a block off plate. The later 90's blocks are cast for the fuel pump but not machined. Also if it is for a TBI motor the cam in it may not have a lobe for the fuel pump.
The L31 and part number are the latest version of the SBC from 96-2000. It's not the TBI engine which was the version before. http://www.jegs.com/webapp/wcs/stores/servlet/KeywordSearchCmd?searchTerm=12530283&storeId=10001&catalogId=10002&resultCatEntryType=2&Ntk=all&Jnar=0&Ne=1+2+3+13+1147708
He will need an electric fuel pump, even if the boss is there, and the hole for the pushrod is drilled. The cam in a native TBI/TPI/EFI engine does NOT have a lobe to run a fuel pump.
What about this set up from Jegs? Has just about all you need and almost the same price.... KK ngine Components Packages 809-10067353KC GM Goodwrench 350 Engine Performance Bundle Includes: GM Goodwrench 350 Engine Chevrolet Perf ZZ Series Aluminum Intake Chevrolet Perf Intake Gasket Set Chevrolet Perf HEI Distributor Chevrolet Perf 6.75" Harmonic Balancer More info on Chevrolet Performance 10067353KC FREE SHIPPING & HANDLING! $1,988.95 Manufacturer's Availability Date Unknown
L31 (Part [HASHTAG]#12530283[/HASHTAG]) That is the Vortec 350 '96 up. You will need Vortec intake, headers and electric fuel pump. Best Iron heads made though. Specs: RPO - L31 1986-2000 style block, 1pc rear seal 4 bolt mains -(No mechanical Fuel Pump Provision) Nodular Iron Crankshaft Powdered Metal Connecting Rods Hypereutectic Pistons 9.4:1 Compression Ratio Roller Camshaft- Specs- Intake Lift- .414" Exhaust Lift-.428" Intake Duration @.050"- 191 Exhaust Duration @ .050-196 Lobe Centerline-111 Vortec Cylinder Heads- 64cc,1.94" intake,1.50" exhaust Includes: Oil Pan, Timing Cover,Valve Covers and Harmonic Balancer
I kinda wondered that. I have only ever used those motors for a mild build up and always tossed the cam out and replaced it.
When the carburetors went away, so did the lobe. A cam-swap can fix it, but make sure before you buy.
Thanks guys. So to clarify, along with the L31 I will need the intake, distributor, and electric fuel pump to convert it to carburetor. I won't need to do anything else to it for the carb conversion, right ? Thanks again guys, huge help from the Hamb community.
So long you have a Vortec intake. And Vortec headers. They do not swap with the pre-96 small block stuff.
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