Sean W.

im buying main bearings right now, and i see that some are " 1/2 Groove " and some are " full " all i see is that written.. whats the difference and what do i need for my 68' 302?

my77stang

1/2 means the top part of the bearing (that sits in the block) has a groove to let the oil flow all around the crank. full means the part of the bearing that sits in the cap has the same groove. its better for oil, but there is less bearing material for the crank to ride against. higher end bearings also come in 3/4 groove, which IMO are the best. for your build i would just go 1/2 groove

Sean W.

awesome, thanks

67mustang302

Just get good quality bearings, Clevite, King etc

Sean W.

im going with summit bearings

67mustang302

I dunno who makes their bearings, but they have their valvetrain stuff made by Crane, so they prolly use a reputable manufacturer for their bearings

my77stang

dont chance it (i said this in your .020/.030 thread too), you dont know who makes em and you need to know you have good bearings or your motor will not last. 67, i wouldnt use kings if you gave them to me - they are cheap crap. ACL's are probably the only "no-name" brand i would use, they are actually very good.

Clevite 77 or Federal Mogul FTW, and then if you wannt spend more the higher end bearing from either of them are even better. i had federal mogul H14 overlay 3/4 groove bearings in my last motor, and when it essploded the bearings looked great

Sean W.

...i already bought the summit ones.....
i have a summit cam.. and i like the quality of it alot.. and i have never heard anything negative as far as summit parts..

my77stang

the first summit cam i bought took a crap (lobes got wiped off) very quickly. they replaced it, and i'll never know if it was because i didnt break it in properly or if it was a bad bumpstick

Sean W.

well i unkowingly lied, my dad hasnt orderd the parts..

give me a link to ones you think i should get.....