this is what I found......weight in red
Chevy L6 194-250 440
Chevy L6 216/235 630
Chevy L6 216/235 615 (88) 265 V8 was 40# lighter than 235
Chevy V6-90 229, 4.3 425Chevy V6-60 2.8, 3.1 350 (2)
Chevy small block V8 575 generic for '60s-'70s motors
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 V8 348/408 655 (83)
Chevy big block V8 685 Mark IV
Chevy 454 675 (10)
Chevy 427 ZL-1 550 (35) Aluminum, 20# lighter than SB