I'm restoring my 67 GMC pickup. I've sold the worn out, non original 283 and am looking at replacement motors. I don't need 400 hp, but, of course, the more power the better! That said, I've had the truck for 30 years and it probably never had over 150 hp, so any new motor will be a great improvement.

Jegs has a 195-260 hp crate 350 for $2,200 with intake, carb, hei distrib and coil and some shiny stuff
Chevrolet Performance 10067353K1, GM Goodwrench 350ci Engine & Packages | Chevrolet Performance

Jegs also has an entry level of this same motor for $1450.00, without carb, intake or hei or for $1,880 I can get this motor with a Performance ZZ alum intake, intake gaskets, HEI distrib and 6.75" harm balancer.
Chevrolet Performance 10067353, GM Goodwrench 350ci Engine & Packages | Chevrolet Performance

A local engine rebuilder has 350 rebuilds for $899.00 with no intake, carb or hei, but a $200 core (I don't have a core engine since I sold mine).
CSD 350 Stock Replacement

The $1,450 Jegs motor is really tempting, but since I don't have an intake or distrib, and the edelbrock carb I have probably needs rebuilding, is it worth buying the $2200 motor instead?

Thanks for any input! I'm obviously not a motor guy, so any input or ideas are appreciated! I'm also looking at serpentine belt kits, since I have no brackets, pulleys, etc.
Jegs has one for $1800.00
March Performance 21150, March Style Track Small Block Chevrolet Serpentine Pulley System | March Performance

LMC truck and Vintage air both have them in the $1800- $2,200 range. What do you guys think of these serpentine belt kits?

Thanks!