I tried installing the 440-1 I have on my high deck bracket motor with Harland Sharp 1.6 rockers, 6 of the intake pushrods (7/16 Mantons) hit the heads Is this common? I had ran these heads and rockers on my low deck street motor with no problems using Manton 3/8 pushrods, is it the low deck angles or the diameter of the pushrods making the differences? I had to take the heads off and grind on them to get clearances My favorite thing taking a motor apart when you think you got it assembled ready to run and clearanced properly. That will teach me to switch heads after the motor is ready for the dyno
440-1 head users, am I the only one with this problem or is it common?

I use offset lifters and had to grind mine.

My 3/8 pushrods rubbed on the top edge of the block with the 440-1 heads. Made a witness mark about 1/4" wide but because of the aluminum block it didn't hurt anything. I just ran it that way until I put the B1s on.

mine did with T&Ds and Smith Bros. pushrods, standard rollers (not offset), RB. but it was very slight

Muscle Motors clearanced them when the heads were being CNCed

this thread brings back bad memories!

Yea I have an aluminum block also and had rub issues and offset lifters! I ended up with a couple busted lifter link bars and the lifters spun and the pushrod was flexing a bunch enough to also break/stress and chip the edges of the pushrod cups(TD rockers) LESSON LEARNED! It took alot of head off and on for clearancing! oh well its fixed now.....

-1 head, Indy 1.6 rockers, 440 block, offset comp rollers lifters, 3/8" pushrods. Yes they rubbed the block at the bolt hole bosses on deck of the block for the head bolt holes. Ground the bosses down for clearance. Swithed to HS rockers with SB 3/8" pushrods and they just barely rubbed the edge of the head gasket to where it polished the push rods. Beep

Cab, this is verry very common. wouldn't it bee nice if manufactorer just sent a little note saying that this may occur so one could mock up and check before torgueing the heads on. Been there done that with all indy parts on the motor including their block. Would have thought they would have put enough of their stuff together to know that push rod clearence was a problem and done the machine work before sendind the heads. Just a thought.+

The heads were used when I bought them, they had been ground on some by someone before I bought them. The pushrod did not rub at all on the 400 block with the 3/8 diameter pushrods so when i switch the heads to the 440 block I didn't have any pushrods in stock long enough to work on that motor so I mock up some shorter 3/8 and called Manton with what I guesstimated (thought) would be the correct lengths by counting and deducting the lengths of the threads exposed ( I should have ordered a checking pushrod to start with ) I did call Harland Sharp to see what amount of threads they wanted exposed under thier rockers, zreo to 3 threads max. I originally wanted to order a set of 3/8 with .147 (whatever that correct size is ) wall series three pushrods, I let Mantons salesmen talk me into the 7/16 x .095 sereis three The short 3/8 I used to mock up rubbed some but I was hoping the longer pushrods would not rub Not so lucky I even tried ordering some single tapered 7/16x.167 wall to 3/8x.120 for the intakes(the exhaust are okay), they rubbed also I ground the drivers side down this afternoon a little which fixed it , it didn't take a lot. I'll do the other head this week and put it back together BTW, I forgot to mention that I am not using offset lifters The low deck motor didn't either

been there, done that, part of life with Indy gear.

not just indy gear... source, eddy, even aftermarket chev and GMH stuff like crane & yella terra etc etc... all the same senario... hey even factory stuff too... its never ending, thats what makes the hobby I guess . I had to clearence my indy SRs for push rod cup clearence with 1.6s... but not my eddys, so much for stock replacement huh?

I use Trend push rods that have a fat meaty cup, with the 1.5 rockers they fit close but with the 1.6s they needed a touch with a die grinder for better clearence, thw heads have plenty of meat in thats area & I thhought indy would have clerenced them... but no.

I had head and block clearance problems. I have a Mega block.

that's part of custom engine building. and yes, i've had to grind a few sets...