Hypothetical Race bone stock L-31 SBC vs bone stock 5.3 LS

[68Chevele]

I want to bring this up as Back years ago I ran a bone stock (except for headers, intake and carb) L-31 Vortec engine with the stock truck cam that even only pulling 4500 rpm his a great 13.07@101mph
Now I would like to find someone else that has run a "bone stock LS 5.3" with the same bolt on parts. I have found a few videos of 5.3's stock but most of them are street cars running mid 14's and 15's

So between the two in the same type of car which do you think is better, you already know my opinion with what I ran, let's hear it.

 

[Leadhead]

I'll take the L-31.

 

[Jasons69Chevelle]

350 cubes vs 323
Are we talking a new LT/5.3 direct injection? Or the older one.
More fare comparison would be LS1 346ci vs 350 sbc. Or you could go the other way and LS3 376 vs 350.

 

[Derek69SS]

I had a stock 2000 truck iron block 5.3 in my car temporarily. I never did run it at the track, but it made 266rwhp on the dyno at Street Machine Nationals

Tuned on 91 with headers and FAST 92mm intake.

Probably would have been good for mid-13s

 

[bikeron]

Trucks are often lighter than a passenger car...