ApplicationCompatible for Chevy, compatible for Ford when using for Holley 4150 or 4160 series carbs.For 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351w 347352 360 390 406 427 428 429 460 351c 351m 400m 273 318 340 360 361 383 400 413 426w440 455 330 326 engines when using a 4150 / 4160 series carb.- Note: will not work on 4500 dominator series carbs.Features- Use with all original and aftermarket applications.- Bracket fastens to carbs mounting studs, including dual stainless steel return springs which are adjustable for tension.- Package includes: All hardware and brackets included. As shown in our pictures.Warranty: one year warranty for any manufacturing defect