you can get a better motor for 3k
https://www.yearone.com/Product/1967-87-chevy-gmc-truck/ct350pc1Year One Power Crate 400hp 350 crate engine assembly.
Engine Specifications:
* Horsepower: 400+
* Torque: 400+ ft/lbs
* Compression ratio: 9.7:1
* Dyno-tested: Yes, includes 8" balancer & 14" flexplate
* Dyno sheet: Included with engine's output
* Vacuum produced: 12hg @ 800RPM
* Recommended fuel: 92 octane
* Max recommended RPM- 5800
* Block: Seasoned 4-bolt iron
* Crankshaft: OE cast iron
* Pistons: Hypereutectic
* Connecting rods: Powdered metal
* Camshaft- Hydraulic roller with YearOne proprietary specifcations
* Rocker arms: Stamped steel 1.6:1 ratio
* Cylinder heads: Ported Dart Iron Vortec
* Valves: Stainless steel 2.02 int/1.60 exh
* Valve springs: Heavy duty
* Bore x Stroke: 4.04" x 3.48"
* Intake manifold: Dual-plane aluminum
* Oil pan, timing cover, valve covers included
* Engine fasteners: High tensile strength
* Warranty: 12 mth/12,000 mi
i dont know anything about turbos