Here's the deal, My new(but used) Vigilante Converter has a 3 bolt mounting pattern. This is for my 2500HD. I am almost certain I will need a new flexplate as I don't think the stock one has provisions for this bolt pattern.

What flexplate will I need for this to work?

 

This is what I think I may need, the FP319

http://www.meziere.com/index.php?pgName=flexplates

any input or experience?

 

Yes it will work... I am running the same combo!

 

the FP319 right?

 

Yes sir...
See I do lurk around here every once in awhile...

 

I had 6 holes on my stock flexplate, and I'm pretty sure it was to accomidate two different 3 bolt patterns. I know thats how it is on GEN 1 SBC's. However if funds allow, you can't go wrong with an aftermarket SFI flexplate. With your hp/tq goals, the weight of your truck and the STR of the vigi's you're better off doing this know. I found this out the hard way on my Camaro. I also noticed that the engine rev'd easier. Maybe it was all in my head, but I really think the added mass helps.

 

Maybe we should just trade moregrip. I need a six bolt pattern flex, and you will be only using three.
Nice to see ya post green thunder. I get tired of search old post to try and find the link to your web page to look at pics. Now it will be easier to find for a few weeks. lol

 

why thank you kind sir

 

Can you use 3 of the six holes? I hope so because thats what Im planning to do with my fuddle coverter.

 

I don't believe you can, that's why I started looking