Curtis 59 what a find!
The 270 Jimmy is a great performer too without breaking the bank. Getting started all over is tough but it is doable. If you are wanting some affordable 270 performance items I'd suggest you look at what Jim Carter's shop has along with Patrick's down in Arizona. Both stock a lot of the inline Jimmy items. Also, I suggest you look at the Inliners website at www.inliners.org and look it over. There are a lot of inline engine folks on that site and they do have a lot of knowledge they'd share with you. Good luck. That is a nice truck. I still run a Jimmy 248 and it has a lot of miles on it but still keeps going.
Normbc9