Big Mutha' Thumpr 243/257 Hydraulic Roller Cam Street/ strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. Fits Ford Big Block/385 Series 429 and 460

Mechanical Roller-Ultimate Pro Street, 4000+ stall/4 speed, 11:1+ compression, radical idle. Ultimate Pro Street cam 4000+ stall/4 speed, 11:1+ compression, radical idle. Fits Ford Big Block/385...

Mechanical Roller-Great power, 11:1 compression or better with 4500 stall. Great power, 11:1+ compression with 4500+ stall. Fits Ford Big Block/385 Series 429 and 460

Hydraulic: Jet boat with B impeller. Flat bottom or hydro bracket Racer. Likes tunnel ram. Fits Ford Big Block/385 Series 429 and 460

Mechanical Roller-Works best in 460 or larger engine with 11:1 compression and tunnel ram. Works best in 460 or larger engine with 11:1 compression and tunnel ram. Fits Ford Big Block/385 Series 429...

Solid: Bracket Race or limited street use. Must have low Gear with 3500+ stall. 10.5:1 compression. Racey idle. Bracket race or limited street use. Must have low gear with 3500+ stall. 10.5:1...

Mechanical Roller-Blown alcohol or blown gas. Use in 500 or larger engine. Blown alcohol or blown gas. Use in 500c.i. or larger engine. Fits Ford Big Block/385 Series 429 and 460

Solid: 4 speed or 4500 stall in 460 c.i.d. and 5000 stall in 429. Jet boat A impeller, hydro or flat bottom river racer. Use tunnel ram. 4 speed or 4500 stall in 460c.i. and 5000 stall in 429. 11:1+...

Mechanical Roller-Use in large engine with 11.5:1 compression and 5000 stall. Use in large engine with 11.5+ compression and 5000+ stall. Fits Ford Big Block/385 Series 429 and 460

Mechanical Roller-5500+ stall or 4 speed in light car. 460 and larger engine. Good for unblown gas or alcohol. Two 4 BBL or injection. 5500+ stall or 4 speed in light car. 460 and larger engine. Fits...

Hydro or flat bottom with two 4 BBL on tunnel ram. Good for bracket racing. Fits Ford Big Block/385 Series 429 and 460

Mechanical Roller-Pro stock style engine 500 or larger, Boss SVO or TFS heads. Pro Stock style engine, 500c.i. or larger, Boss, SVO or TFS heads. Fits Ford Big Block/385 Series 429 and 460