Monsoon install questions

[VeesGN]

Anyone know what adaptor plugs I'll need to install a Monsoon radio, amp, antenna and speakers into my 87 GN w/Concert II? I looked at the Metra website, but there seems to be a lot of part numbers for similar items. The numbers I'm looking at are 71-1858 (plugs into the radio), 70-1677-1 (plugs into the GN harness, and 72-4568 (connects to the speaker wires). The radio plug description says 4 spkr and 21 pin. Will that work with the Monsoon or does it only fit the base model radio? Which antenna adaptor? I received the Monsoon radio, but the speakers and amp haven't arrived yet to compare plugs. Here's the Metra site:
http://www.metraonline.com/productcatalog.htm

 

[Kevin Turch]

where did u get the monsoon stuff?, i wanted to put them in my GS since it only has concert sound 2.

Thanks
Kevin

 

[VeesGN]

I got the radio from LS1.com or camaroz-28.com site ($120 w/shipping) and the speakers/amp from Ebay ($72 w/shipping).