big block or not??
Thread Starter
1st Gear
Joined: Jan 2010
Posts: 1
Likes: 0
big block or not??
I am looking at a 69 "big block" car. It has a non numbers BBC right now. I am a GM guy and can recite production numbers and differences in other chevy muscle but Im new to vettes. So could someone tell me how to tell between a big block and small block car. I dont want to buy a car with the thought that its a 427 car and it turns out to be a 350 bargain basement sham.
Safety Car
Joined: Nov 2008
Posts: 3,716
Likes: 551
From: Seattle Washington
The best and only real way is to look at the build Sheet wich was at one time on the Top of the gas tank. Short of that Look at the Rear End. The 1/2 Shaft U-Joints should be held with Caps and not Straps but that could of been changed since. The Rear should also have a Code on the Bottom wich could tell if it was a Big Block or not. A lot of people advertize a 427 as a rare car but they made a lot of 390 HP Cars not all that many less than Small Blocks.
Racer
Joined: Jul 2005
Posts: 408
Likes: 0
Also look at your techometer
Engine HP YELLOW ZONE RPM REDZONE RPM
Base 300 5000-5300 5300-7000
L-46 350 5700-6000 6000-7000
LT1 370 6300-6500 6500-7000
L-36 390 5300-5600 5600-7000
L-68 400 5300-5600 5600-7000
L-71 435 6300-6500 6500-7000
L-88 430 6300-6500 6500-7000
Engine HP YELLOW ZONE RPM REDZONE RPM
Base 300 5000-5300 5300-7000
L-46 350 5700-6000 6000-7000
LT1 370 6300-6500 6500-7000
L-36 390 5300-5600 5600-7000
L-68 400 5300-5600 5600-7000
L-71 435 6300-6500 6500-7000
L-88 430 6300-6500 6500-7000
