low deck based 383/432 builds...

Most likely ,440 Source Stealths. Crower 32244 hydraulic NT/EXH - Dur @ .050” Lift: 238°/249° RR: 1.5/1.5 Gross Lift: .534”/.552” LSA: 112° RPM: 2000 to 6000 Redline: 6500