AMC 360 390 401 Connecting Rods

Molnar AMC Connecting Rods

Molnar Technologies H Beam rods are machined from billet 4340 steel, and then heat treated to provide improved strength. To make the rods even stronger, they are shot peened to which also increases fatigue life. All Molnar connecting rods are fitted with highly durable premium bronze bushings for use with floating pin type pistons. Each rod set for the American Motors engines includes ARP fasteners, moly lubricant and installation guidelines.

We have rods available for the AMC 360, 390 and 401 engines with stock stroke crankshafts and also special AMC stroker rods, 6.000 inch long for use with either a 2.000 inch or 2.100 inch crankshaft rod journal size as used on many AMC stroker cranks.

All Molnar rods are finished in the United States at the Molnar Technologies shop in Michigan. Critical rod dimensions are are held to very precise tolerances of +/- .0001 of an inch, which is the tightest tolerance you will find in the performance and racing aftermarket.

Molnar H Beam AMC Connecting Rods

amc 360 rods

amc 401 connecting rods

 

Molnar AMC Rod Specs and Prices

  • Length Length of the connecting rod, as measured center to center, in inches.
  • Wt Weight in grams, of one complete connecting rod assembly
  • Desc Additional information about specific applications
  • Jrnl Crank rod journal diameter
  • Pin Size Piston pin diameter, in inches or millimeters
  • BE Width of the crankshaft end of one rod
  • PE Width of the piston end of one rod
  • Bolts Rods come with 7/16" diameter ARP2000 fasteners installed
  • Part Number Molnar Technologies Connect Rod set part number
  • Price The price shown is for a complete set of rods for the engine

AMC Rods

Length Wt Desc Jrnl Pin BE PE Part Number
5.875 633 AMC 360 2.095 .930 .995 .990

AH5875AJAFB8-A

$708.39 $611.84
5.858 653 AMC 390 and 401 2.248 1.000 .916 .990

AH5858WUB8-A

$708.39 $611.84
6.000 621 AMC stroker rod.for use with AMC stroker cranks using 2.000 inch small journal, small block Chevy size rod journal and with .927 wrist pin diameter 2.000 .927 .940 .990

AH6000LLB8-A

$708.39 $611.84

 

6.000 639 AMC stroker rod.for use with AMC stroker cranks using standard 2.100 inch small block Chevy size rod journal and with .927 wrist pin diameter 2.100 .927 .940 .990

AH6000NLB8-A

$708.39 $611.84

 

Comments

  1. Paul Mercer says:

    I’m building a AMC 426 stroker motor and don’t want to offset grind a factory 401 AMC crank to 3.85 because I feel that a brand new 4340 crank with 3.85 stroke would be much more durable . My question for you is that I would like to know if you make the AMC stroker rods (Part Number AH6000LLB8-A) with the correct AMC offset and a 3.85 stroke crank that’ll work with those rods ? Do you have a price for a package deal for the crank and rods ?

    • Hello Paul,

      We appreciate you visiting our site and taking the time to check with us on crankshaft availability.

      The AH6000LLB8-A AMC connecting rod set does have the correct offset for use in AMC blocks. They are designed for use with an offset ground OEM crankshaft which has the crank rod pins turned down to a finished diameter of 2.000 which is the small journal, small block chevy size.

      Unfortunately we do not have any crankshafts for the AMC engines at this time and I am not aware of anyone making one with the specs you requested.

      • Paul Mercer says:

        Thank you for your response ! I think you could sell a 426 stroker kit (crank and rods) that would work together in a 401 block if people knew for sure the they wouldn’t have any issues with them fitting properly . I really like your stroker rods but I’m worried about having another company make a crank for my application . It would really simplify this combo if a company could make a 426 stroker kit . I’m planning on getting started with this 426 stroker build soon and the crank and rods are my starting point . If you decide you want to give this some thought I could mention it on 2 AMC forums that I’m on and see if there’s more people interested . Let me know !

        Paul Mercer

        • Hey Paul,

          Thank you for your input and suggestion. This will be added to our potential project list for consideration.

          The majority of the requests we have received for AMC stroker cranks have been for ones with a 4.000 stroke length so the 3.850 stroke is something new for us to research.

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