Hey guys, I'm getting ready to place my order thru jegs, just wanna to check in with you pros to get any last comments about the products I'm about to purchase. oh yeah do I also have to buy "spring locators" or "stem Locks" or are those optionals?? I'm also not sure if I picked the right springs.
Thanks in advanced.

This is what I have in my cart so far:

249-7608-16 Chevy Magnum P.R. 265-400 w/OEM Hydraulic Roller CAM, DIA 5/16'', Length 7.200
$109.99

249-4808-8 Chevy 265-400 Flat, 5/16'' (guide plates)
$19.99

249-1305-16 SB-Chevy 1.6 Ratio, 7/16'' Stud, 16/pkg, (B)(C)
$259.99

249-4503-16 Magnum Rocker Stud
$49.99

249-925-16 1.510'' Dual-Spring with Damper (920/975) Valve Springs
$122.99

249-741-16 Super lock retainer Lock Angle: 10° Valve Stem Size:
ALL Valve Spring Diameter: 1.500'' - 1.550''
$52.99

 

 

Yes you need valve stem locks, that is what stocks the valve from falling into your cylinder. Also, 1.51" springs are too big for stock heads, you would need to get the pocket machined bigger so they would fit.

Just to make sure; the retainer sits on top of the spring, and that holds the spring down. The valve stem locks hold the valve, and the spring pushes up on the retainer, which in turn holds the valve up since it's pulling the locks with it.