I found this Rd350 & 400 Performance Portfolio at a used book store

[ElFuegoBlanco]

There's a lot of great write-ups and tech data. Very interesting read.

Also picked up Haynes motorcycle fuel systems techbook, which isn't nearly as fun to read.

[SoCal250]

I bought that same book maybe 15 years ago.

[m in sc]

yup i have a copy as well. interesting period pieces