78 mc lug stud length ?

[spongbob]

I need attention longer lug then stock for rear 78 mc . I found some on ee baa the say 1.5 under head isn't that at least .25 longer then factory size ?

 

[Ribbedroof]

I used Dorman 610-157 on my 81 Malibu. Did have to open the holes in the axle flange a little bit for the larger knurl. I used them because I needed to add a 1/2 inch spacer. These are 2.125" under the head. The Dorman 610-259 are 1.75" under the head. The OE stud (Dorman 610-186) is 1.5" under the head

The studs you pictured are the OE length

If all you need is the .25", the 610-259 should go in the existing holes as-is

 

[spongbob]

I used Dorman 610-157 on my 81 Malibu. Did have to open the holes in the axle flange a little bit for the larger knurl. I used them because I needed to add a 1/2 inch spacer. These are 2.125" under the head. The Dorman 610-259 are 1.75" under the head. The OE stud (Dorman 610-186) is 1.5" under the head

The studs you pictured are the OE length

If all you need is the .25", the 610-259 should go in the existing holes as-is

Thanks..