Thanks all - I know most of the history on the engine as in it is a pretty fresh rebuild with about 400 miles, 4.25 stroker crank, # 16 iron heads. Even if I learn they are Comp Cams lifters, I won't know if they are the S version unless I pull the valley pan. Not knowing the recommended preload sucks and is the reason I am asking if Cliff's method would be best to try. A friend sold me the car and he had another fella build the engine. He gave me a bunch of receipts but the roller lifters aren't on there. The cam specs are 230/236, .510/.521, 114 LSA and it has 1.5 HS rockers. I'm using 10W30 conventional oil fwiw.
The noise is mainly from the passenger side so it very well could be one or two lifters on that side. I pulled the valve cover and didn't feel any that were "squishy" when pushing down on the rockers.
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Will Rivera
'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project
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