I built this valve spring compressor back in the 80s for my 65 Dodge factory Hemi. It only requires the removal of the pushrods. $195 satisfaction guaranteed. Info on request
I made a compressor for the gen 3 426 Hemi running the Chevy pushrodstyle system. Again, no removing head bolts. $295 satisfaction guaranteed. Info on request.
Both compressors come with video & written instructions.