19JerseyStang64

I have been lurking in this forum for a while and you guys deffinately know what your talking about. I would like to build my 351 into a stroked 408 with around 450 naturally aspirated ponies. What would it take to get this sort of power and what stroker kits do you guys recomend. Thanks

randy78045

DSS built my engine an i love it... if ya dont wanna go that route, they sell stroker kits as well....

19JerseyStang64

Thanks, any idea on how much power a stock block can take?

randy78045

I'll let someone else answer that 'cuz im not running a stock block an not sure how much it could take...

randy78045

I'll let someone else answer that 'cuz im not running a stock block an not sure how much it could take...

4Stangs

I run a stock block at 637HP N.A. (418 stroker). With a good main girdle and lifter valley support, 700 HP should be reliable if you make sure the block is a good, seasoned one. DSS and CHP recommend a racing block for applications of 700HP up. I'm asking for a split block when I spray my car!

A 408 should be capable of 450Hp pretty easily with good heads and a roller camshaft. Eagle Specialty Products makes good stuff and several folks (like Jeg's) offer 408 forged kits for around $2000. Compression should be around 10.5:1 with a 9.5 inch deck block with a 4" stroke, 6.25 inch rod with a inverted dome (-24cc) piston and depending on the head you use. Trick Flow or AFR 205s with 60cc combustion chambers would be my recommendation with a roller camshaft spec around 290 duration and 550 lift.

You could go a little less radical with 185 heads and a little less cam and probably still make close to 500 HP.

You may want to get a shortblock quote from DSS, CHP or even consider a Ford Racing shortblock. They can put these together for a pretty good price...sometimes less than you can buy parts for.

Count on needing a good radiator with good air flow across it to keep this N.A. combination cool on warm days in traffic.