Posted by Mark (IP: 204.181.93.83) on July 13, 1999 at 20:23:53:
In Reply to: If they have 1.94/1.60 valves, they are not stock... posted by T.L. on July 13, 1999 at 19:00:56:
: If your cam has less than .500-inch lift, you do not need screw-in studs...if it's more than .500, then you do...The Performer manifold would fit the 351 heads but WHY?!!!...They have smaller valves and lower compression due to the larger combustion chambers...
: : Okay...I have stock 65 289 heads with 194/160 valves. Slotted pushrod holes. The only advantage I can see to screw in studs is that they won't pull out. Does anyone really see any other reason that I should concider this option? What about roller rockers????
: : I would go with 351 heads, but would my 289 Performer intake fit on them? And isn't there a water jacket that needs to be cut in the 351 heads? Haven't really put a finger on the whole 351 head conversion. I
: know that it was mentioned below, but some of the more unanswered questions are remaining unanswered there.
: : Stock push rods. Would I need valve guides with the slotted heads?
: : I know that the 351 heads have larger runners than the 289, but is it really worth the effort on a street machine. Not planning on racing. Need drivability. Have an extra set of 289 heads.
Figured it might be a good idea. Why does everyone else seem to want 351 heads???