TBI 454 vs. TBI 383

[andrewmp6]

I would use the 454 it will be harder on fuel but will handle a load better,But have you thought about a diesel tho?The old 6.2/6.5 will pretty much bolt in and have enough power to tow with.Or money is no problem a 12 valve cummins can be a monster if built up.

[Edahall]

Originally Posted by andrewmp6

I would use the 454 it will be harder on fuel but will handle a load better,But have you thought about a diesel tho?The old 6.2/6.5 will pretty much bolt in and have enough power to tow with.Or money is no problem a 12 valve cummins can be a monster if built up.

Yup, a built up Cummins 6BT would be nice but probably the most expensive option. That's what I did with my 1990 Suburban. However, fuel mileage literally doubled so now is payback time.

[JCampbell]

Originally Posted by andrewmp6

I would use the 454 it will be harder on fuel but will handle a load better,But have you thought about a diesel tho?The old 6.2/6.5 will pretty much bolt in and have enough power to tow with.

I’ve done a little research and I’m leaning more towards the 454 as well. I’m aware of the fuel consumption (this isn’t my first big block). However, when you compare the RPMs each engine will be turning to produce comparable torque numbers, I have a hard time believing that a 383 is going to net any significant increase in mileage.

Not interested in diesel.