I am thinking about stroking a 351w into a 393 for my '70 Mach. What are the best 351w blocks to use for a roller camshaft? I know if I use my '69 351w block that I will have to purchase the roller conversion and have to do some block work. Are newer model 351w blocks better for this 393 stroker idea? If so, which year models or casting numbers are good and which cars or trucks received these blocks? Thanks.
351w Stroker Block
- Thread starter wickedmach1
- Start date
The 69-74 model blocks are the best to use. Just compare the webbing around the mains ( 69-74 is much thicker) and you'll see what I'm talking about. Casting #'s start with D9 and go through C4 for these engines. The roller conversion is a simple conversion, but IMO the gains aren't worth the extra $$$. A simple hydraulic will make enough power for 95% of the street engines out there. A co-worker fo mine has three roller conversion kits laying around and prolly be willing to part with one if you're interested.
jasonn
Founding Member
Jammer is right. The roller kit is kind of expensive and yes you do have to machine the block. But all you really have to do is drill and tap 2 extra holes to mount the spider so it's not that hard. I just bought the other roller conversion with my new 408 that I'm building. It's the crane linked lifters. They are hydrolic roller, crane part# 36532-16. These are a drop in coversion with no extra work involved but these are $400! 
I think the roller blocks didn't come out until 1994??
I think the roller blocks didn't come out until 1994??
all 351w blocks are good for building a stroker motor as the block are all about the same as ford didnt change them much over the years. slightly taller deck in th emid 70's, and roller cam settup in the 90's, but other than that no real changes.
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