Busted Knuckle
OBS Enthusiast
Has anyone done an apples to apples comparison between the gen 5 tbi big block and the gen 6 vortec big block. I have a nice virgin gen 4 short block and a complete gen 6 mpfi system to play with. I'm just wondering if it is worth the effort to change over. If so I would need to decide on cylinder heads. I know the L29 heads are popular with their 100cc quick burn chambers.
The big difference between GenV and VI is the use of a roller cam. There are also water passage hole differences to watch when swapping heads between gens.
As an aside, I see here in TX if I want to license it as an Antique Truck, it is supposed to have matching serial numbers.