are they the same

[sledge]

are the non efi and efi basic engines(block and head) the same??????

[Sancho]

I believe the blocks are slightly different so that there's somewhere to plug in the additional sensors for the EFI.

[nero279]

aye there's a crankshaft position sensor somewhere on the EFI, not sure about any other differences

[sledge]

will that make any difference if an non efi goes into and efi truck?

[marky]

YES TPS missing as mentioned before

[NiftyNev]

YES TPS missing as mentioned before

TPS is on the throttle housing not the block. EFI has a Crank Sensor just behind the fuel pump and a Coolant Sensor behind starter, just below the head roughly between cylinders three and four.

Nev

[NiftyNev]

will that make any difference if an non efi goes into and efi truck?

Yes. It will never run properly unless a crank sensor and a coolant sensor is used. The ECU needs these.

Nev

[marky]

OOPS