Good looking truck Peach... I'm looking for one right now to put one of my spare motors in. Ive got a little 355 sbc dyno @ 515hp. I like those all the way to 72 model.
355 with 515 is a high dollar sum biotch... Mine has a 428 small block with aluminum darts, big motha thumpa roller, 11.5/1 comp. 4l80e tranny with a 10" hughes verter. Figure my shcrap box is makin maybe 500-550.. She runs better than most street rides around here

Mine has aluminum heads also it makes 13.1 compression but that 428 is a great motor man specially the dart heads. My new motor for my mud toy is a all oem but going to push about 720 all motor 468ci..