Lets say I wanted to build a 351w block w a supercharger blower that would bolt right into my 69 coupe with a small bell C4. What do I need to think about. Id like to be able to use my cylinder heads too. Would 69 heads work on the second gen block with the higher deck height and bolt to the same tranny with same flywheel?
Im guessing for simplicity Id want to find the same older block.?
I know theres a website somewhere that has the diffs between the older and newer block.
All of the 351W blocks (and all 351C blocks for that matter) have the exact same bellhousing bolt pattern, and it's the same as the 302/5.0L.
The cylinder heads were the same between the years with regards to fitment, with the differences in the areas of port and valve sizes, type of rocker arm mounting, etc. Each of these heads will physically bolt onto any of the blocks
HOWEVER--you probably wouldn't want to use them, because there is a SLEW of aftermarket heads out there that flow FAR better than the heads you have, and cylinder heads are the key to making power.
You can get a set of iron heads that flow really well for around $800 (several manufacturers), and a set of really nice aluminum heads for $1100-$1500, new--and quite a bit less if you shop around for a set of used ones.
Many consider the AFR 185's to be the best out-of-the-box heads for either the 302/5.0L and the 351W engines (and all sorts of engine sizes in between, like the 331, 342, 347 strokers), and I found (and bought!) a barely used set of them for $1100 a couple of months ago.
For factory iron heads, the GT40 or GT40P heads are hard to beat, but there are problems using the GT40P heads, including fitment problems with headers, due to the different spark plug angle, smaller combustion chambers, etc.
While you can build an engine yourself, if you're not completely familiar with the process, it might be a good idea to let an engine builder choose the parts and put them together for you . . .
No one makes out of the box pistons for low deck blocks.
I'm sorry, but with all due respect, that statement is simply not correct.
Probe Industries
1.772" compression height
http://www.wiseco.com/Catalogs/Automotive/Ford.pdf
1.769" compression height
United Engine and Machine Co.
1.774" compression height
JEPistons.com | FORD - 351W FLAT TOPS
1.774" compression height
Block deck height: 9.48"
Rod length: 5.956"
Stroke: 3.5"
If you add the rod length and half of the stroke length together, you get 7.706"
If you subtract that from 9.48", you get 1.774", which is the compression height needed to have a zero deck on these blocks.
As a matter of fact, when I researched building my first 408 stroker several years ago, it appears that the
OPPOSITE of what you stated is true--just about every single manufacturer I found built their pistons based on the 9.48" deck height blocks,
NOT the 9.503" blocks; there are several examples of popular piston manufacturers listed above to illustrate this . . .