Engine swap

[Cowboy13]

Ok guys I got a k20 70’ chev with a tired ol 350. Swapping her out for somethin newer. What would be best to put in this girl. I’ve heard the LS engines are the way to go. Any suggestions are much appreciated. Thanks in advance.
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[garyd1961]

The ls is a good motor but a vortec 350 is a lot easier with fewer modifications. The vortec would be a big improvement over your old motor.

[west9378]

I just posted this to another thread,
My 71 K20 is at the shop for an LS and 6L90 swap from a donor 2008.
I purchased cross member from Dingo Motor Sports and the adapter from advance adapters for the transmission to transfer match.

Paid $2000 for the wrecked 2008 with 200,000 miles and got engine trans electronics etc...
Dingo Motorsports 1967-72 4x4 LS Conversion Cross Member/ Clam Shell / Adjustable / Black DD-LS-CM1 $454.97
Dingo Motorsports 1967-72 4x4 LS1 - LS7 1 3/4" Long Tube Headers DD-64-1302LS1 $329.95
Michigan Motorsports BTR Stage 2 Truck Camshaft, springs, seals, gaskets and Pushrods BTR3128110+SP011+Hat $579.99
Michigan Motorsports LS1 Rocker Arm with upgraded Trunnions Installed LY6 25100 $199.99
Michigan Motorsports 2004 + LS9 Head Gasket and Head Bolt Kit AJ311+K7100-2 $159.99
Michigan Motorsports CR-5 Timing Chain Set with Cam Sprocket, ARP Cam Bolts, Crank Gear, C5R Timing Chain and Dampener F3100+F3200+F3300+F5100+F4100 $229.99
Michigan Motorsports Melling Oil Pump High Volume 10296 Ai124 $164.99
Michigan Motorsports Delphi LS7 Lifters Set of 16 and Guide AJ261+97500-04 $194.99
Michigan Motorsports LS Billet Aluminum Oil Diverter Barbell and Metal Bypass Delete 87100 $39.95
ICT Billet LS Billet Oil Pump Pickup Girdle Tube Pipe Hold Down Brace Support 551910 $24.99
Pace Performance LS F/Body Oil Pan Kit - PAC-8771 PAC-8771 $207.25
Superior Radiator 67-72 Chevy Truck Radiator LS1 Conversion with Dual Fans $600.00
Summit Lokar ACA-1809-Lokar Column Shift Linkage LOK-ACA-1809 $74.95
Summit Fel-Pro Conversion Gaskets Fel-CS9284 $136.99
Summit Chevrolet Performance Camshaft Retainer Plate NAL - 12589016 $27.99
Summit ICT Billet Camshaft Thrust Plate Bolts ICB-551950-CAM $14.99
Summit FlowMaster Delta Force Cold Air Intake Kit FLO-615400 $368.95
Fueltankparts 63-72 C10 Side Fill EFI Tank with Aeromotive Stealth 340 Pump 14003 $0.00
Summit Chevrolet Performance Timing Cover NAL-12633906 $117.95
GM Parts Store Oil Dip Tube 12609269 $25.19
Summit ACDelco GM OE Harmonic Balancer ADO-19300488 $66.75
Advance Adapters GM 6L80 / 6l90 6 Speed Automatic to GM NP205 Transfer Case 50-9551AB $762.15
Azproperformance Boyd Tank , EFI Returnless Line Kit, 90 ohm Sending Unit, Rollever vent, Mounting Kit 14003 $1,288.00
Performance System Intergration 2007-2008 LY6/L96 (6.0L) / L92/L9H (6.2L) With 6L80E/6L90E Engine Controller Kit $1,407.63

My shopping list "so far" for parts on this journey

I hope this is helpful,