Went to the regular parts store. The tool they loan out is not tall enough to use with CC 918 springs. Looked at a couple other types, I'm changing the springs with the head on, dont have a lot of clearance in any direction. Anyone know of a particular one that will work?

 

You could make your own

 

I have this.....

http://www.summitracing.com/parts/CRN-99473-1/



Works like a charm on 3/8" studs(I changed my springs before switching to 7/16" studs...fits on the rocker studs and compresses both springs at one time...just be sure the piston is at TDC...valve can drop to touch the piston no issues with losing them in the cylinder...again....piston at TDC). Should work under the 4th gen f-body cowl really well. If needed, you could also have it drilled out to 7/16".

 

I have the Crane compressor for SBC and its worth its weight in gold especially considering they are no longer available. Looks very much like the one in the photo. I drilled mine out to 7/16".

The lever type compressors dont work well on5,6,7,8, due to the overhang.

 

Yea, I'm worried about the space restriction and am switching to 7/16" studs rather than 3/8"