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Discussion Starter · #1 ·
I just got my first 460 (1985) tore down to the block. My plan is to put it into my 71 mustang with a TKO 600. I have not taken the block to the machine shop to have the final measurements yet.

My plan for the motor is to put a stroker kit in it, 4.5in and build it to a street/strip motor with 90% being cruising and backroad fun. I have read and gained a lot of information from this forum, but I just now have to figure out the final details on my build. I want to do my best to plan this out so I can slowly gain the parts until I'm ready to put the motor in the car.
I am hoping to run it up to 6500rpm.

The questions I still have are what is the limit of a cast 4.5in crank?
Can a hydraulic flat tappet cam run up to 6500rpm or would it be better to put a solid roller on a hydraulic cam? And would the solid roller on the hydraulic still need as much lash maintenance or more like do it once and forget it?

If anyone has answers to these questions or would be wiling to help with more details with my build feel free to comment! I look forward to gaining more knowledge till I can feel the power of the BBF
 

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The questions I still have are what is the limit of a cast 4.5in crank? You never know until you crack it in half. However.. you should be good to 6500 RPM. I spun the weeeee out of a cast 4.3 Scat crank for years. Took it to 8000 RPM more times than I can count. It never failed and the motor made around 800 HP. It sure tore up some stock rear ends though. But here is the best tip I can give you. If you can't afford to break it...don't build it. Get a solid build on paper for the intended use so you know the money part in advance. Because if you don't do this and you think it's going to cost 5K. ...It's really going to cost 13K. Times 2. :)

Can a hydraulic flat tappet cam run up to 6500rpm or would it be better to put a solid roller on a hydraulic cam?
YES. But it depends on which cam and more importantly what lifters.

And would the solid roller on the hydraulic still need as much lash maintenance or more like do it once and forget it? You will have more maintenance with a soild lifters of either type. Hydraulic lifters are the "set it and forget it" lifters.
 

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First I would forget the TKO and go right for the T-56 Magnum. Yes the magnum will cost more $$ but it’s a better and stronger design plus you have 2 gear ratio versions to pick from. Secondly this isn’t a stock 2.5L Nissan Altima engine, there’s gonna be routine maintenance associated with it. How many miles do you plan on putting on the car each year?
 

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Discussion Starter · #5 ·
Thank you Mr!

Wicket, the reason I am wanting to go with the TKO is because I won't have to cut the transmission tunnel in my car. Unless you know the T56 will fit without problem?
 
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