Correlations - Homogeneity of Variance

Hi, Please help, I'm in the middle of a research project,under pressure, and I just can't think straight. I'm using SPSS.

I have data which is normally distributed, several variables which I will be running correlations with.

What I'm concerned about is that the sum variance's are vastly different. How do I check for homogeneity of variance?

Should correlations be run using z-scores? or does the SPSS process itself convert to z-scores as part of the Pearsons calculation.

Many many thanks