Expected HP/TQ gains??

[Makdaddymac]

I just want to do a gt40upper and lower manifold swap.Abou how many horses should that give me.
and secondly maybe a 65mm tb.

 

[Makdaddymac]

how many horse should i expect with just the manifold and then the tb. two seperate numbers please.

 

[Grn92LX]

8-12 with the manifold and 2-4 with the tb.

 

[N8Miller]

25ish total.. about 17 to your wheels.
will be a nice addition, but save up for heads and a cam first.