valve springs....questions

[Old Guy with 87 GT]

?????>....i'm doing a little research on what valve springs to buy......i'm looking for low budget springs that will work well on e7te's with roller rockers (1.7)and a stock cam.....
(there might be a mild cam in the future.....b or e cam .......but for now i just need a low cost set for my 1.7s)..

if anybody's been following my other posts , ........i redid my heads --milled ,ported and did valve job with brand new springs-- and then installed 1.7 ratio roller rockers ....well i got it all put back together and found my valves are floating at about 5,500 rpms.....
......... i did a little asking around and it seemed at little odd that i was having problems at such a low rpm...i've heard that peaple have had the same problems but were able to wind higher and somtimes havn't even had any problems......
......... well i looked at the invoice from the machine shop that did the valve job on my heads ........on the work order it say's "83" 302 , i know there's a big differents in the 83 non roller moter and i'm thinking that the springs in the two different years might be interchangable.....
?????>...can you guy's tell me if the different year and style moters have different 'spec' springs and can they be interchanged ....i'm going to go to the machine shop monday to talk to them and find out more ....i'll keep you guy's posted.......till then what springs can i get (low budjet) to remedy the problem????