4.3 motors are expensive for the power you get, Id go str8ight to a 5.7 or at least a 5.0 V8 The 4.3 may show better horse power, but the torque of the 3.7 or 5.0/5.7 v8 shows in a boat
BTW, Ive got a used 5.7 TBI complete engine that has a rod knock from low oil pressure. Its complete, manaifolds, harness, injection, etc... It was a salt motor. $500. It will need to be gone thru, but everything is there
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