Looking at some sbc retro roller cam upgrades and you can get a kit and caboodle and not just the cam.
Which I understand is handy it if it's all from the same company.
COMP Cams K12-432-8: Comp Cams 'Xtreme Energy' Hydraulic Roller Camshafts | JEGS
Purely out of technical interest when they say stock springs no good etc that throws up a few questions...
(bearing in mind heads are mild Edelbrocks to start with - and I wouldn't ignore recommendations)
1, does it mean that generally the stock springs will be too weak and valves may float ?
2, stock springs may crush with the extra lift - stock head says max lift .490 and new cam claims .520
C, does that not make the actual valves/stems too short or summat ? unlikely I imagine, what's 30 thou between friends - no kits state new valves required, just wondering.
4, also states heads need machining! what for ?
many thanks in advance