I went with Heidts M2 on my 1946 w/ LT1 V8 & auto trans. Their tech guy recommended 350lb springs and standard width arms and not to go with the narrowed arms. I actually got mine from Minnesota Hot Rod Hardware. Price was similar to Speedway but Hot Rod Hardware had $20 shipping and I would have had to pay Nebraska sales tax from Speedway. Tough to buy local when it’s $150 just for sales tax.
