A 400 with cast-iron heads weighs around 575 lbs. Here are few specs:Chevy Vega L4 285 Chevy II 153 L4 350 Chevy L6 194-250 440 Chevy L6 216/235 630 (2) Chevy L6 216/235 615 (88) "265 V8 was 40# lighter than 235" Chevy V6-90 229, 4.3 425 Chevy V6-60 2.8, 3.1 350 (2) Chevy small block V8 535 (1) ('59 Corvette 283 w/alum. intake) Chevy LT-5 DOHC 5.7 600 (122) Chevy L98 5.7 V8 600 (122) Chevy V8 348/409 620 (1) Chevy big block V8 685 Mark IV Chevy big block V8 --- Mark V Chevy 454 675 (10) Chevy 427 ZL-1 550 (35) all-aluminum, "20# lighter than SB" Ford flathead V8 525 (124) 1932 model, integral b'hsg, iron heads Ford flathead V8 569 (1) ('53 239 CID) Ford Cosworth DFV 353 (2) (racing engine, DOHC, 3.0L) Ford 255 Windsor 468 (4) Ford 289/302 V8 460 (168) (late 5.0s are a bit lighter) Ford 221-302W 460 (48) Ford Indy 255 pushrod 360 (120) all aluminum, 1963 Ford Indy 255 DOHC 400 (120) 1964, later known as Foyt Coyote V8 Ford 5.0 V8 450 (109) Ford 5.0 V8 411 (171) 89 Mustang 5.0 GT (dry) inc: manifold, carb(?), headers and alternator. Not inc: starter, smog pump, power steering pump, AC compressor, flywheel Ford BOSS 302 500 (48) Ford 351 Cleveland 550 (48) (includes BOSS and Australian 302-C) Ford 351 Windsor 510 Ford 351 Windsor 525 (48) (168) Ford 351M-400 575 (48) Ford Y block V8 625 (272-312 CID) Ford FE big block 650 (332-428 CID) Ford FE big block 670 (1) ('59 352 CID) Ford FE 625 (48) Ford 427 SOHC 680 (48) Ford 429/460 V8 640 Ford 429-460 720 (48) Ford 460 V8 720 (10) Ford BOSS 429 680 (iron block, aluminum heads) Ford BOSS 429 635 (48) Ford 4.6 SOHC 530 (93) iron block, aluminum heads Ford 4.6 SOHC 473 (72) Ford 4.6 SOHC 600 (168) (Mustang) Ford 4.6 DOHC 464 (72) "9 pounds lighter than SOHC" Ford 4.6 DOHC 437 (77) without accessories Ford 4.6 DOHC 521 (94) aluminum block and heads Ford 4.6 DOHC 576 (168) (Mustang) Ford Triton V10 635 (128) "dressed" Chrysler 2.2 L4 216 (6) (bare motor) Chrysler 413 wedge 640 (1) ('59 300-E) Chrysler 331 Hemi 745 (5) 1955 Chrysler M4 tank engine 5,244 (87) 30 cyl, 5 banks of 6, flathead, WWII Chrysler 1955 V8 691 (99) Spitfire, 'polyspheric', 300 ci 188 hp Chrysler 1955 Hemi 729 (99) Firepower 331.1 ci, 250hp, 1x4v Chrysler 1955 300 Hemi 735 (99) C-300, 331.1 ci, 300hp, 2x4v Chrysler Patriot 186 (110) gas turbine (part of hybrid EV) Chrysler CR2A turbine 410 (111) 1964 Turbine Car, 130hp SAE net
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