As with the stroker a turbo is way over budget even for a u-fabber tailpipe build
getting low end torque with a turbo requires a special turbo or we did it with a pair with all the exhaust going in to one then as it spooled up used a cast stainless diverter to bleed into turbo two could get boos just winging the throttle!
no way would I use a retrofit hr on a 318 when the later blocks and later LA 360 blocks had the provisions built in
as does the Magnum- and the Magnum stock truck cam is perfectly ok for your use
without porting the heads you don't half an inch lift anyway- the 260 HRcam spec i mentioned was out of line- you could do it but you shouldn't (and it's too big for stock compression for down low grunt)
