5.0L General DiscussionThis section is for non-tech specific information pertaining to 5.0L Mustangs.
Welcome to Mustang Forums!
Welcome to Mustang Forums.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
Building a 347 out of using the Ford 'BOSS' block isn't really a good idea if you are thinking of using a 3.400 stroke crank.
For some reason Ford made the cylinder walls on the new blocks very short towards the bottom, this causes the piston to travel to far out of the cylinder when used with a 3.400 stroke crank.
Better shops won't even build one the way.
However, you could make a 347 by doing a 331 and overboring it to make a 347.
Cgheck but I rthink it's something like 3.250 stroke and then 4.125 bore to get to 347, that may work out for you......
Also try CHP.com for good quality engine parts..........
GOOD,FAST, CHEAP-----------YOU CAN ONLY GET 2 OUT OF 3!!!!!!!!!!!!!!!!
The (BOSS 347) is a 331 kit with a 4.125 bore and DSS has good stuff we used a dss 331 kit in my buddies engine there rods and pistons are a different hieght and length though... They use a 5.315in rod and a taller piston in there kits i forget right ofhand what the pin hieght was.
He opted for the DSS main support and windage plate which was a total bomb imo the dipstick will not clear the windage plate and there are no warnings of that so we didnt know until we had it all together and in the car!
The stock 5.0 pans come in 2 different designs you can hardly tell by looking at them seperately one will clear the mains, support, plate and pickup one will not...(even on stock blocks with main supports)
The oil pickup for the BOSS block is about 100$ you can try and bend or mod a stock one but you wont have fun doing it.
DSS overall is a great company and have quality parts just over-priced on some of it!
Hot 302, pop-up pistons, 3/4 race cam, 4 prong race plugs and some go juice lmao! Sig inspired by true ignorant *** people!
This forum is owned and operated by Internet Brands, Inc., a Delaware
corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford
Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor