$ Building a Slant 6 for performance

I appreciate the /6 for what it is, one of the most durable engines ever & guys on here do some really cool stuff with them. However, I've come to realize that it takes a lot of money having someone else do the machine work necessary to get a /6 much more HP. Shaving the head, if not the block too raising the compression, & putting in oversize valves. Besides your usual bolt on mods, like a 4 barrel, Offy or Clifford Header etc. Unless you Super/Turbocharge.
Not that re-sale value should be a very top priority in this hobby but it's good to realize if you decide to go V-8 after you've spent $1,000+?? or more on the /6, it's still probably not likely to fetch $200. Fewer interested buyers=lower demand= lower price. Sure, you could show some receipts, but it's still a hard sell. There is kind of a stigma attached unfortunately. For example you could start at 220 HP with a 90s Magnum 318 (for about $300 around here) and go up from there HP wise, instead of spending a ton of money on the six. However you would have to get a 318 727 trans, and 8 1/4 or expensive 8 3/4 rear end. That's probably $600-$1,000 maybe. A few trade offs. To each his own. My 198 /6 is still stock at this point, I've picked up on great info thanks to this great forum.
Hi Ewood67
Wow you guy are very lucky being able to get parts so cheap!! Here in Australia the parts and builds are Sooo much more expensive I’d love to supercharge my slant but just not sure if I want to spend 12-15k on building and supercharging my slant, or building a snappy V8 and components to suit, and yes some people like and want a all original car to buy and others might prefer a modified car we all like and want different things.
Just wish we had all the choices and prices of in the States.