P.S.I.cho

ive got just about enough to start purchasing part for my build up but before i do, ive heard from multiple people, technicians and racers, and they all have split opinions, simple question, is a 4 bolt main necisary on a 408 stroker or will the 2 bolt hold up?

Tim37

2 bolt will hold but your gonna need a good block any oem block newer than 73 isn't gonna hold up with any kind of big power.

351foxstang

it depends on how much power you are planing on makeing.

Tim37

well a late model block is good to about 450hp if he isn't planning on makeing more than that why build a 408

P.S.I.cho

the motor i looked at was about 500 HP to the flywheel but its only a 2 bolt main, and i wanted to supercharge it later but it will be a while before i can afford the s/c i was trying to plan ahead so i dont end up blowing up a $5,000 motor

Tim37

find you a sportsman block they run about 1000 dollars but for a motor under 1000hp its your best bet theres no need in dumping a lot of money in like a dart block for a medium hp motor but you will need a good block.

tinman

There is no good reason that a post '73 block will not hold up as well as an earlier one if it's used for a 408.
There have also been some 600HP motors built with 2 bolt mains.......

P.S.I.cho

i was just asking because i can get a "builder motor" 351w wich is an old motor where the top end is about shot but the block is still useable, he is only asking $250 and he says if its cracked he will allow me to exhange it with another one

Tim37

with the excepiton of maybe the boss engines all the windsors where 2 bolt so thats a given

but a pre 73 351 blocks have more and stronger main webbing that will alow them to hold more hp.

tinman

You may also note that the pre '73 blocks are a differant deck hieght as well.
Still no reason that they can't go to 600 HP and live.....