Probably has roller rockers too with the adjustment for clearance at the push rod. They are taller than original style rockers. The roller lifter conversion is all in the lifter valley and makes no difference under the valve cover. The strap is the only significant addition and it prevents the lifters from spinning.
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Mitch
1970 Chevelle SS
1966 Chevelle SS
1967 Camaro ss/rs
1938 Business coupe, street rod
2000 FXSTS, original owner, 13k miles
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