Engine angle and IRS Angle

[Tiger]

Hi all,



At which angle I should mount the engine and transmission in my Chevelle chassis?
I know that most Dragrace cars have the engine at zero degrees and that most production cars are at approx 3 degrees (being lower in the rear), but I have understood that this is only to create clearance, am I wrong?

Using the Corvette IFS I'll move the engine rearward anyway to clear so I will in any case have to make a new floor and firewall, therefore I'm just interested in whats best.

Can somebody also please explain at which angle I should mount the corvette IRS in my chassis as well.

The IFS is setup for a 3deg rake of the frame if that matters.



Thanks!
André