want free jegs gear?

Comment on any of our posts with your expertise and we'll send you a bag of JEGS schwag.

Learn More >

Customer q:

I am going to purchase a L31 HD. I can't remember the part #, but it's the new GM one for $1899.00. It will be mated to a th350 original to my 71 chevy truck. Which flexplate do I use for this application? I understand it's the one for a one piece rear main seal. Maybe you could steer me in the right direction? Also, tell the boss to design some JEGS engine packages for these vortec crate engines. You have many for the old style non roller blocks, but only a few options for the roller design. Thanks!


ac = No

drivewheel = 4WD

engine = 283 ci going to be replaced with L31 vortec

fuel = carb

make = chevy

model = k10 p/u

pwrbrk = Yes

pwrstr = Yes

trans = auto th350

year = 1971


Thank you for contacting JEGS for your automotive needs. You will need flexplate #601074. I'll be sure to pass along your message about the vortec crate engine packages and we appreciate the feedback. If you need any further assistance, please reach out to us 24/7.

JEGS Performance Products 601074
‍Heavy-Duty SFI Flexplate for 1986-1997 Small Block Chevy

car specs

social media

exterior modifications
interior modifications

The JEGS Difference

We are dedicated to providing our customers with the very best in selection,value, same day shipping and lifetime support. Thank you for choosing JEGS!

auto car parts help
Posted on
May 10, 2018
Product Info

Psst! Want a chance to win FREE SCHWAG? Comment on this post and click here for details on the JEGS Comment Contest >

You Might Also Like

Follow us on Instagram to get notified about new products and discounts

Follow Us