This guide will cover the locations for the shield parts and Acid Gat parts.

Shield:

Skull -
1) In between the store and blacksmith shed - https://imgur.com/HAfXjA1
2) In undertaker on a coffin - https://imgur.com/RRSuvec

Pelvis-
1) Behind the saloon on a bench next to shovel wall buy - https://imgur.com/Po13wYO
2) Behind hotel on a crate - https://imgur.com/6sO9476

Window-
1) In spawn near the well - https://imgur.com/01igmRf
2) Outside the church near stairs - https://imgur.com/Lb97Sp4

Acid Gat kit -

Engine-
1) Behind Hotel nearby in a stall - https://imgur.com/E3c9BnL
2) Top floor in Saloon under a table - https://imgur.com/cGbaNVo

Acid-
1) In undertaker under staircase - https://imgur.com/kLdYz4A
2) In Sheriffs office on the right side - https://imgur.com/MsMXAet

Any problems please comment below