You probably need to address the fuel system first as it appears you are maxed out at 6600RPM. With more power i would imagine that limit comes down further.
I am hoping you have already found the SVTperformance forums as they are SVT specific and you will find more people who have a lot of experience with these cars. First, as above, your fuel system needs to go bigger, and if you are typically looking for more power, then a return system and E85 if you have it available are the next steps. The VMP blower you have is a good piece and if you want to go over 700 you could sell it and buy a bigger Whipple. One bit of warning. A much bigger blower will make more top end with some loss down low. Find the conversations there about some regretting going to a much larger blower as they feel less punchy down low on the street.
I am hoping you have already found the SVTperformance forums as they are SVT specific and you will find more people who have a lot of experience with these cars. First, as above, your fuel system needs to go bigger, and if you are typically looking for more power, then a return system and E85 if you have it available are the next steps. The VMP blower you have is a good piece and if you want to go over 700 you could sell it and buy a bigger Whipple. One bit of warning. A much bigger blower will make more top end with some loss down low. Find the conversations there about some regretting going to a much larger blower as they feel less punchy down low on the street.
Thank you very much I have purchased a lethal performance dual in tank pump set up with new rails regulator lines as we and it’s a return systemll ID 1050