1975 Crate big block
Thread Starter
Advanced
Joined: Nov 2004
Posts: 71
Likes: 0
1975 Crate big block
Hello-
I am new to this forum and a prospective C3 owner. Great information- very knowledgeable folks-
I think I want to purchase a 70's convertible and with a standard engine and then have a crate 454 dropped in.
I know that the last year of the big block was 74 but does anyone know if can I just as easily but a BB in a 75 convertible?
Any advice would be appreciated-
Thx
Lou
I am new to this forum and a prospective C3 owner. Great information- very knowledgeable folks-
I think I want to purchase a 70's convertible and with a standard engine and then have a crate 454 dropped in.
I know that the last year of the big block was 74 but does anyone know if can I just as easily but a BB in a 75 convertible?
Any advice would be appreciated-
Thx
Lou
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
I'm guessing there is no difference in the frame itself, especially in the engine area. However, you will have to replace the radiator since the SB ones are smaller. Also, most small block accessories probably won't fit the BB (fuel pump, fan, pulleys, etc.), but you probably knew that already. Bellhousing would also need to be changed and you'll probably have to beef up the transmission also. But this type of work is what makes things interesting, right? 
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
The motor will drop right in. No need to change the bellhousing as they are the same. You will be putting on new fuel pump and water pump anyway. The brackets for the acc. will be different and a new rad will be needed. Probably a newset of front springs won't hurt either. Many here have converted their post 74 cars to big blocks. Not a real big deal to do. Just costs $$$ as does everything on a Vette.
Racer
Joined: Aug 2004
Posts: 399
Likes: 0
From: Chambersburg PA
I agreee with Page 62....If your looking for a car to Mod...get a 73-74. I see this emmissions thing only getting better and as those cars were pre Catalytic converter most all of the new laws will not apply.
Thread Starter
Advanced
Joined: Nov 2004
Posts: 71
Likes: 0
Thanks for the info- Sounds like doing a 74 Mod is pretty much the same as doing a 75. $ and all....
BTW is the Auto transmission on the 74 the same as the 75?
BTW is the Auto transmission on the 74 the same as the 75?
Last edited by LouAZ; Nov 19, 2004 at 06:40 PM.
Thread Starter
Advanced
Joined: Nov 2004
Posts: 71
Likes: 0
Originally Posted by 75rag4sp
I agreee with Page 62....If your looking for a car to Mod...get a 73-74. I see this emmissions thing only getting better and as those cars were pre Catalytic converter most all of the new laws will not apply.
Last edited by LouAZ; Nov 19, 2004 at 04:45 PM.
Safety Car
Joined: Jun 2004
Posts: 4,652
Likes: 80
From: Lakeland Florida
Hello,
I thought you might be in Arizona with the name LouAZ.
If you are going to rebuild or modify the engine, then the smog laws of the state will prevail. You said you could register it outside of Maricopa county so that probably puts you near Phoenix, Tempe, Mesa, etc.
Good luck finding one.
kdf 1973 454
kdf 1986 L98
I thought you might be in Arizona with the name LouAZ.
If you are going to rebuild or modify the engine, then the smog laws of the state will prevail. You said you could register it outside of Maricopa county so that probably puts you near Phoenix, Tempe, Mesa, etc.
Good luck finding one.
kdf 1973 454
kdf 1986 L98
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Thread Starter
Advanced
Joined: Nov 2004
Posts: 71
Likes: 0
Thanks-
I think the way it works in Arizona is that if the car is registered in Maricopa county (Phx, Tempe, Mesa etc...) or Tucson then all vehicles after 1967 need to pass emissions. However, if you register it outside of Maricopa county then you can get a waiver. I do live in Tempe but also have an address in the northern part of the state that I plan to use.
Lou
I think the way it works in Arizona is that if the car is registered in Maricopa county (Phx, Tempe, Mesa etc...) or Tucson then all vehicles after 1967 need to pass emissions. However, if you register it outside of Maricopa county then you can get a waiver. I do live in Tempe but also have an address in the northern part of the state that I plan to use.
Lou
