w8less

i plan on building a either a 408 stroker or a 427 but i heard that when u do that you have to bore the block out 60 doesn't that weaken the block severely? but i saw that chp has a kit that says you can use either 30 or 60 bore does neone else know about this?
and now to the topic my friends is building a 347stroker for his 88gt and i am building at least a 408stroker for my 95GT who do all think is going to be seeing whose tail lights?

mkspeed26

.060 is the most you can go and still be safe. the CHP kit will have different displacements based on .030 or .060 over. you can assume about 4 cubes more for the .060 version.

and about the "whos gonna win", it depends on thje other mods you do. if u build the 2 engines the same and the cars are very similar with other perf mods, ya ur gonna win. but if he puts more money into h/i/c and a tune he could beat you. also depends on who gets more traction off the line, tranny mods, etc. too many variables to tell

JD1969

My .02 If you go bigger than 347 you might want to consider an aftermarket block. 5.0 blocks are not known to be the strongest when bored out that big, 450-500 hp seems to be the limit.

w8less

oh when i say i would be building the block it would be a 72 351w block so thats what i am stroking i have been told a 351w stroked to 408 thats carbed could have 400hp

stanglx2002

sure it easily i have 400hp with my 331 and talk to NOS408 about the engine he can tell you a lot about it and answer your questions

69mach1377

The cubes is just part of the story. The heads and cam is most of it. You could easily get 500 hp out of a 408, all engine, no spray. Didn't say it would be cheap...