Before I would put a 426 Hemi in the car, I'd look at a modern hemi. Performance wise, it will beat the 426 if done right... and probably if done half assed too. Next thing... Ever own/work on/drive/ride in/etc. a 426 Hemi car? It's all good when they run right... and if you really ask the few that really know... There aren't a lot of folks out there that make them run well on a day to day basis. I have a good friend that builds FAST (factory appearing, stock tire) drag car Hemi engines. He's one of the few that can make them work. I've ridden in his personal street car and it is impressive. BUT! He will tell you... a well prepared 440 will kick the ass of MOST street hemi cars and do it every day, day in, day out. Back in the seventies, our cars, my 440 6BBL Roadrunner and his 69 Hemi GTX would run within a few tenths of each other. Same tires etc. I'm trying to remember the last Hemi car I drove and I think it was the '66 Charger. Geez that car was nice... Ran nice too, but you'd have to push it off a cliff to make it real fast. I wanted to buy it, but $4k might as well been a million bucks at the time. It wasn't happening. It was pretty typical of the Hemi cars that were made to run well. A few were both fast and ran well, but it seemed more like it was a choice. That was before they became trailer queen/ giant paperweights and I probably could have gotten it to run better, but I digress. So.... I'm going to suggest something to save you tons of dollars. Build a huge inch 440. One of those stroked 500 inch plus strokers that makes gobs of torque. Fit it with a early 60's cross ram with the AFB carbs that sit over the fenderwells for visual effect or a six pack. There... I just saved you $20-40k and gave you a faster car that will roast the tires at will. But, build a 426 if you really must. The low end torque for a heavy car isn't going to be there, so it isn't going to be all that fast. You'll have to run some gear (again making up for the lack of low end and the Hemi will want it anyway) so highway isn't going to be a lot of fun. You'll be spending a ton of cash anyway, so overdrive might be the ticket. You can expect to have to wrench on the engine to keep it running right. If you can't do that, and I suspect if you are looking at a shop, you might have to get used to dropping the car off. I've kinda given up telling people that things are dumb ideas, so I'm not going to do that. I just get some shit for being the only honest guy in the room. Right @commando1 ? It's your car... Your money... Insert some quote about Dairy Queen.