Closed chamber with flat tops

Thanks for the quick reply........the springs were replaced with the recomended ones from Comp cams........over revving? Most certainly.
My biggest concern is the use of non relief flat tops with closed chamber heads. I did not measure how far down the hole the pistons are but it isn't much. I can not find any info on the heads but know they are small valve. The block is a '90 LA 318 and assume the heads are also '90 vintage.
Just wondering if anybody has had a similar setup and had any issues with clearance.