What does it take to make more power?

[August]

Yes, I'm sure that 72" Ford 302 V8, C4 trans, Chevy rearend, & Holly EFI TBI put out over 200 HP. I thought the question was getting to the 200 HP range with the lampretti twin cam. Unless you can find the extremely hard to find multiport head... No, you wont be able to do it.

yeah realistically I'm aiming for 140.

[Nut124]

140HP is possible. One thing to keep in mind; there is pretty much no bolt on power for these old engines. Performance parts do not fit together like they may for modern engines. Just about everything requires fitting, adjustment and/or minor alteration. Paying someone to do it gets very expensive. Then, there is the fine tuning; cam timing, ignition timing curve, carb jetting etc.

Before I started my build, I asked for a price from a well known Fiat engine builder to do the whole engine. $12k. I thought that was expensive. So I did almost all the work myself and ended up just about at the same price, spending some $$ on special tools etc.

This is where I would start:
4-2-1 header
40/80 cams
single plane intake manif
Weber 32/36 DFEV carb

This could get you to over 100HP without upping static CR, assuming the rest of the engine is in good shape.

[August]

140HP is possible. One thing to keep in mind; there is pretty much no bolt on power for these old engines. Performance parts do not fit together like they may for modern engines. Just about everything requires fitting, adjustment and/or minor alteration. Paying someone to do it gets very expensive. Then, there is the fine tuning; cam timing, ignition timing curve, carb jetting etc.

Before I started my build, I asked for a price from a well known Fiat engine builder to do the whole engine. $12k. I thought that was expensive. So I did almost all the work myself and ended up just about at the same price, spending some $$ on special tools etc.

This is where I would start:
4-2-1 header
40/80 cams
single plane intake manif
Weber 32/36 DFEV carb

This could get you to over 100HP without upping static CR, assuming the rest of the engine is in good shape.

Thanks for the info what do you think the the difficulty level is on swapping the intake manifold?