i have a 56 m100 and want to put ifs front and rear. i will be puting a motor that will be pushing over 400 hpr and would like to know a good brandname of ifs kit to buy. any help would be greatly appreciated.

 

Welcome to the forum! And a special welcome to a fellow Merc guy!

My opinion is you can't go wrong with either Heidts or TCI. All of their stuff is top notch!
And this is coming from someone who's actually used the stuff, too.

 

Welcome to FTE! As 52 Merc says, TCI or heidts are good choices. HP really doesn't drive the IFS choice as much as it does the rearend design...that said, almost any 9 inch Ford rearend should easily handle that HP. The real choice will be whether you want a 4-link or leaf spring suspension, both have their own strengths and weaknesses...your choice will be based on your needs. There are also independent rear suspensions available...Corvette, T-bird, Lexus, etc. that are a little easier on the wallet than a Heidts. Once again, your needs will drive the choice. Good luck!