D.Hearne said:I voted no, but this only applies to a flat tappet block. If you have a roller block, roller wins everytime. The cost difference is more than $400 to convert. You already have a cam, you'll have to add the new one to the cost. Plus lifters, pushrods, new valve springs, etc.
I thought the top of the lifter bores needed clearancing, but I know your level of knowlege on such things and I stand corrected.302 coupe said:there is no machining required unless the dogbone and spider setup is used. Link-bar lifters require no machining 99% of the time, any work that light be needed would be due to excessive casting flash in the lifter valley around the lifter bore.
Where you going to get a cam AND hydraulic roller lifters for $350 ? Using the factory style lifters in a non roller block also requires using a reduced base circle cam ( that's $350+ there by itself). Using Crane's retrofit lifters ( $425) you can use the std base roller cams ( but a custom blower cam will still set you back more than a std cam will) You will need new pushrods, no getting around that, and those will likely end up being custom jobs too, with all the mixed up parts. You may have done the math, but I've done it too--- several times and fitting a roller cam to a non roller block always came out costing about $600 minimum. Hardly worth the cost differential over a good flat tappet grind. And if you're thinking on using a set of used factory lifters, that's all good, but forget about reving it over 5500 rpms.(just in case you had that in mind)nonosstang said:Well, I was figuring $400 in my case. I already have the other stuff. I just need a new cam and lifters. The difference in price from Summit is about $350 since I need to get a new cam anyways. Then, another $50 for the retrofit kit.
He'd still need to add in at most another $100 for custom pushrods. Prices on off the shelf flat tappet cams are about the same as std base rollers (for 5.0's anyway) in that case, the lifters cost you $425 for Crane's link bars. Using the factory lifters, requires a reduced base cam, that's going to run hum at least what the Crane lifters cost, seeing as he's going to have to go custom with the supercharger application. I don't see where he figured $350 from.steel1212 said:I think we are missing something here. I don't think he is including the price of the cam in as he needs to get a new one anyway.
"price from Summit is about $350 since I need to get a new cam anyways"
So with that theory it would be about 350$ for the lifters, plus another 100 or so for gaskets.
D.Hearne said:He'd still need to add in at most another $100 for custom pushrods. Prices on off the shelf flat tappet cams are about the same as std base rollers (for 5.0's anyway) in that case, the lifters cost you $425 for Crane's link bars. Using the factory lifters, requires a reduced base cam, that's going to run hum at least what the Crane lifters cost, seeing as he's going to have to go custom with the supercharger application. I don't see where he figured $350 from.
69Rcode_Mach1 said:If you are going with the roller you will need new pushrods regardless, in fact you need custom ones. Take it from me I am doing the swap right now, and stuck on trying to get the right size pushrods, I will have to go custom to get them right. What valve springs on what heads are you running? Mine were fine because they were Victor Jr.'s but the ramp rates combined with high lift will kill a normal spring that isn't designed for the application.
unless you have a set for a hyd roller cam lying around, then yes, you do need new pushrods.nonosstang said:I don't need new pushrods.
Edbert said:I thought the top of the lifter bores needed clearancing, but I know your level of knowlege on such things and I stand corrected.
:SNSign:
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