[Old Guy with 87 GT]

i'm currently having my moter rebuilt and was curios about what kinda comprssion ratio i'm going to come up with.......

i had my engine 0 decked and the decks milled to bring the pistons up higher in the hole
.....i didn't have any specific numbers on the last post ....but got some more info thursday

the engine is bored to a 306 with speed pro forged pistons....flat tops with 4 valve reliefes .......i chamfered the edges of the valve reliefes ,but not enough to effect there ratio much .........according to speed pro there advertised compression with a 63.5cc head is 9.2 -1 ....(part # L2482f )

my e7ets are milled 020 witch should bring them to around 60.5 cc s
....according to my engine builder he milled my block so the pistons are .030 in the hole ......took like .030 off one side and .040 on the other ,reducing deck hight to around .035 shorter then stock........im using the felpro performance head gaskit ...think there like .040 crushed thickness ...not sure

my best educated 'guess' would be around 9.7 to 1 .....but i'm not sure how to calculate it .....any help would be appreciated

.........my engine builder could calulate it for me ,but he's pretty busy so and i didn't ask him to come up with an exact number ......as long as it's not higher then 11-1 it's not a big concearn .....but i'm still curios

also any body with experience doing this when building a moter ,feel free to comment on the plus/minuses of 0 decking ........i'm still pretty new at this so if there's anything i should know chime in

other specifics ..
e-cam (already checked for valve clearance)
had moter balenced
i'll be using the stock crank and rods(returned and resized)
arp head stud kit and arp rod bolts added
using plasma moly rings(file fit) and clevite bearings
everything else new (in short block)
see sig for other bolt on specifics

thanks in advance ...james