So what would you say....

1. 440 Source.

2. Mancini.

3. Muscle motors.

And so on just to name a few i know there are other so is there really a clear winner or are they all made by one or two suppliers then they put there names on them.

take your pick,i have 2 440 source motors right now.470 and 512 lowdecks.i also used a ohio crankshaft kit in a small block.i have a 499 lowdeck with an eagle kit in it but it is just hangin on an engine stand lookin for a new owner.

What do you want for the 499 Lowdeck....

Just call Nick at www.compu-flow.com
Nick will set you up with a total package that will exceed your expectations.
Gus

Mine[499] was built by Pete at Best Machine.

Ohio Crank

nick is the man I have used 4 of his this year 2 hemis 500 cubs and 2 520's
http://www.compu-flow.com/

I will look into what Nick offers...

Used an Eagle kit from Muscle Motors and One from 440 Source, no problems with either.

I built my 493 with a 440Source kit. I checked everything after I got the kt and found everything within specs. I did a few mods myself but nothing that was a problem. Biggest thing I had was the piston pins are all tight in the rods but it was no big deal to me as I like to set the specs where I want them and all I did was hone the rod bushings to get the spec where I wanted them. Its been in my 63 since 2011 with alot of street miles and a few passes down the track. It has been flawless with zero trouble for the 2-1/2 years I have been driving it with the 493 in it. Ron

I carefully measured everything in the 512 440Source stroker kit, and found all to be good.
Same here, a few piston pins were a little tight, but no big deal.

Never hurts to ask from all of you who have used the kits before to find out what is good & what is having trouble...

Thanks for the advise..

I make my own stroker kits, I use Ohio Crankshaft Forged steel cranks, imported from China BB Chevy sytle long H beam forged steel rods, I use custom made or shelf American made brand (Ross,Diamond, Kieth Black Icon) pistons, rings and bearings I have all the clearances set for those parts by a really good machine shop and I then assembled and check the clearances and finish blueprinting the motors myself You can do the same thing yourself

I am doing more or less the same as you i already have a 4.15 stroker crank & H-Beam rods i still need the pistons & all the other stuff like bearing & so on...