s4 na to s5 or s5 na swap?

[NoDOHC]

so my old s4 motor is lone gone now and I just picked up an s5 motor from an 89 with 98k on it, came with harness and manifolds.

Initially I was just expecting to get the short block and swap manifolds, but its got the harness to it and everything.

I plan on running premix regardless, but the main question is what would suit me better? using my s4 electronic control system on my s5 motor with s4 manifolds or using the s5 setup entirely (I have an RB header, so no use of the stock exh manifold thank god)

and here is the kicker, earlier in the fall someone decided to smash my passenger side window out and totally smash my spedo/odometer so I would likely get a new cluster anyways and thats have the battle, all I would need is an ECU, I want to get rid of the power windows anyways and go to manual.

I'd assume I would also need the s5 idiot cluster too.

am I forgetting anything?


also, the hybrid intake manifold swap I know of people using the s5 UIM intake on the s4 LIM using the VDI for more power, but is this for just s4 blocks? should I go with a hybrid intake manifold or just use the S5 one?

[Fidelity101]

so my old s4 motor is lone gone now and I just picked up an s5 motor from an 89 with 98k on it, came with harness and manifolds.

Initially I was just expecting to get the short block and swap manifolds, but its got the harness to it and everything.

I plan on running premix regardless, but the main question is what would suit me better? using my s4 electronic control system on my s5 motor with s4 manifolds or using the s5 setup entirely (I have an RB header, so no use of the stock exh manifold thank god)

and here is the kicker, earlier in the fall someone decided to smash my passenger side window out and totally smash my spedo/odometer so I would likely get a new cluster anyways and thats have the battle, all I would need is an ECU, I want to get rid of the power windows anyways and go to manual.

I'd assume I would also need the s5 idiot cluster too.

am I forgetting anything?


also, the hybrid intake manifold swap I know of people using the s5 UIM intake on the s4 LIM using the VDI for more power, but is this for just s4 blocks? should I go with a hybrid intake manifold or just use the S5 one?