This is a complete set-up to convert your 371 from hydraulic flat tappet lifters to a roller lifter system.
It includes a roller cam, roller lifters, push rods, valve springs, 1:1.8 ratio adjustable rockers assemblies.
Cost: $375 plus shipping.
It would also be possible to use this system in a 324 but you would need to obtain a set of adjustable 1:1.6 ratio rockers instead of the 1:1.8 ratio rockers.
Pictures can be provided upon request.
I am located in Minnesota, NE of the twin cities.
Thanks for checking it out,
Wally

This is sold, 4/22/2024