[JV44HeinzBar]

Hi,
I'm having my 70T's engine rebuilt to 70E specs. I've got the pistons and cylinders already (2.2E), but I've got some questions concerning the camshafts.

What are the benefits of going to an E cam vs retaining the T cam? It's my understanding that the T cam will give me more punch down low & in the middle, while the E cam spreads the power out across the tach.

Also, I came across a set of L cams. What would be the effect of dropping these into my engine vs Ts?

Is there an issue or benefit with using cams designed for MFI vs carbs? My car is using IDE40 Webers.

BTW, I know I don't want to use S cams as the roads near my home don't really allow for that type of driving.

One last thing - When I'm looking at camshafts I noticed that each shaft has a series of numbers. While I think I know what they mean, I'm not 100% sure. For example:

1968 911L spm*, air inj., (lft)901 105 139 00, (rht)901 105 110 05, (in)36.5mm, (out)36.2mm

vs

1969-73 911E 901 105 181 00, 901 105 110 05, 36.58mm, 36.25mm

Could someone explain the numbers in detail? I understand what the 901 probably stands for 911, and I think that the 105 is for the center lobe, but I'm not sure. Anyhow, I'm just guessing.

* Does anyone know what "spm" stands for?

Lots of questions I know, but I want my engine rebuild to be just right for my driving conditions. I should mention my conditions are around town a good bit, but I also have the opportunity to blast around some very nice back roads w/ lots of elevation changes and switchbacks.

Thanks,
Brent