I tend to agree with Jim, no matter which year Buick 350 heads were produced they are a tough sell. Tons of people want to gain a few HP on their 350 but most people can’t justify spending mega money on them. From a racer perspective the 350 has so many handicaps it’s insane. Cost of parts, limited cubic inches, etc. It’s not that the Buick 350 doesn’t have potential, it’s that it’s only those of us crazy enough to make poor financial decisions who will go for big power with them. How many of us are there that have the $ and motivation to do these 350s to the limit? A handful, and with a tight knit community of guys attacking each other it’s even more discouraging. Where I see the advantage of the 350 is a stout bottom end that can handle a power adder stock. Once we go with a custom rotating assembly and ported alum heads we are now out of the price range of 80% of the potential customers. It’s not TAs fault, mine or yours it’s just the reality. Those of us who can afford to spend way too much money to make less power can do so because we want to..... But it’s easy to see that even once we blaze the path only a few will follow, while many more sit back and criticize. Heck my neighbor is a turbo kit fabricator and weekly there are 2000 HP big block Chevy and 1500 LS cars going out the door. All of these high HP engines cost less than my 350 which might make 1000 if I’m lucky. Even his junkyard 4.8 or 5.3 are an easy 900 hp with just a few thousand all in. It’s a tough market to compete with. Ta made the investment into these heads knowing that it was a poor financial decision, because they want to help write the next chapter of Buick Performance. Similar to the Alum v6 block they made it will likely never pay itself off however it is an important chapter in the Buick v6 pinnacle of performance. Same idea goes for the 350 heads. They will take 10 plus years to reach the break even point if they ever do. But TA did it because of Michael Jrs passion for this underdog engine. I really do believe that if I (we) keep perusing my quest for blowing peoples minds with the 350 that it will bring in more people to build serious 350s. A long time back talking to a certain Buick guru on the phone it was suggested that he build a 350 for his 16 year old son instead of a 455. He called me out of the blue after reading about our ambitious 350 projects. I purchased an engine and donated it to his cause as he said “I would build a 350 if I had one, but I have 20 455s in my shop”. I had the engine pulled and delivered to him and his 15 year old son rebuilt it with his help and it ended up as a 369 cubic inch 420 hp engine that made 630 hp on 6 psi of boost. That engine is currently getting a larger blower and the TA heads with max effort porting.