71chimera

The venerable L31 Vortec crates are back with a big price increase but some big improvements as well; steel crank, finished mech FP mount and Made In Springfield MO, USA !

https://www.corvetteforum.com/forums...c-vortecs.html

Big2Bird

His options are:
Rebuild it.
Get a crate motor CARB approved for THAT year. I can get him NAL number
Install ANY engine newer than 80, but he must TRANSPLANT ALL and any smog equipment from the "newer" donor car.(Evap system and all. this must be inspected by a CARB referee).
Install a CARB approved E Rod engine. This is what Foose does.
https://www.summitracing.com/parts/nal-19370414

71chimera

Great beaches, mountains, weather & entertainment, but y'all are so boinked by Kali CARB & the like.

Big2Bird

The E Rod thing is relatively new, and the best answer.
Basically, you stay stock, or bite the big bullet.
If you want HP, your going to blow $10K, no matter what you do (Legally).

OldCarBum

Really 10K is cheap HP when you really start adding up what building one will actually cost.

cv67

True....some of GMs crate LS are pretty impressive for what you get..plus everything is brand new, not reconditioned by someone who is just trying to get through his 8. 10k can buy some high powered small blocks or a stout 500ci big block.
Where was all this stuff when my wimpy sbc was being planned!

Buccaneer

NICE on the PASS!

c3corvettes

Thank you all for the advice and tips. I have all the original parts still that came with the 305. I want to stay with the carburetor set up and transfer everything over to a 350 long block. I just don't know what 350 to go with because I don't want to have issues passing the visual and sniffer tests...

Big2Bird

https://www.gmperformancemotor.com/parts/12681429.html



This one is direct replacement, smog legal, warranty, etc.

cv67

You can put a goodwrench, or zzcrate those usually pass that CARB crap.
I bet if everythings in place and it sniffs fine youll pass.

7t9l82

My bet is the can't even find the numbers. Remember this nonsense when you vote.

71chimera

pn 12681429 supersedes old universal replacement 350 pn 10067353
For most intents & purposes, 12681429 is a clone of smog era, low compression RPO L48.
Displacement, compression, cam, valves are or nearly so identical.

? Bird do either of these three current GM crates fit the CARB profile for a 1980 C3 ?
12691671
12691672
12691673

c3corvettes

Bird: I checked out that GM engine and it looks like exactly what I need. I sent you a PM.

68/70Vette

It's a 195 hp engine, and not that complete. Look in the General Motors Performance Parts catalog. There's a SB engine there that is stated to be a legal replacement for a CARB engine made before 1992. I don't remember the HP rating, but it's a lot more than 195 HP....I think in the 400 HP range.

Big2Bird

When I went thru this crap, the one I posted has the L-81 cam shaft. Same numbers. Lift, duration, LSA,, blah blah.

Jebbysan

This is exactly what you need.......paint it blue and stick it in.
OP does not need a "complete" engine......he has to use all of the original ancillary components.
The engine is "rated" at 195 horsepower but they actually make 230-240 or so......it will run better than the 305.......you basically at that point have an 81' 49 state setup.....yes, I said 81'.
Anything else you try to use will require different parts........and there is no drop in engine for this car that makes 400 horsepower with stock emission controls......not to mention that the 305 for Cali in 80' had that miserable 4ME carb.......no way to support a lot of power anyway. This car will never be a rocket, but I don't believe the OP is looking for that.

Jebby