what coil over spring rate do i need?

[swinger74]

Hello, i have a 74 dart with badarts upper & lower conrtol arms and i am wondering what springs do i need? Im going with the strange coil overs http://www.summitracing.com/parts/STR-S5203/ and am wondering what springs i need to go with? the dart will have a 383 & 833.

Thanks
Ryan

 

[AnotherA]

A wise man once told me this.

Recommend springs
450lb-500lb....small block/all aluminum big block and Hemi
550lb-600lb....iron big block with aluminum heads/water pump/ect
650lb...all iron big bloock/Hemi

 

[swinger74]

great thanks, for some reason i thought i needed a 350 (actually need a 650) little difference.

Ryan