I doubt it, without some work to shorten the guides and changing seals. Peanut ports can handle around .500 lift, but not sure of exact spec. I got stuck and had to switch them back on when a 781 leaked. My cam runs.565 and I had to have the guides /seals worked to run them (but it salvaged a month of summer :)). It was more than .050 that had to be cut to get decent clearance, though. Only way to know is measure - compress the valve to the lift required and measure . You want.050 min between retainer and seal/guide.

Did you lose any power going back to the peanuts?

What about http://www.summitracing.com/parts/cca-11-232-3 ?

chris that is not a hyd roller camshaft. i am going to measure the max lift for the heads and see what i come up with. i know comp cams makes a tools to cut down your valve gides to get more clearance. so with the 454 ho cam i am going to need about .600 between the seal and the retainer that will leave about 060 clearance. what kind of seat and open pressure do you guys think 130ish seat 360ish open (sorry i don't have my book infront of me to check numbers)

5 mph, so 100 hp or so. It's a mild build, 450 hp range - a little warmer than the old 420

peanut port 156 casting number •PORT SIZE: 195
•CHAMBER: 115cc
•VALVE SIZE: 2.06 / 1.72
•PRICE: N/A
•[email protected]: 54 / 35
•[email protected]: 123 / 87
•[email protected]: 184 / 121
•[email protected]: 222 / 147
•[email protected]: 226 / 168
•[email protected]: 226 / 174
•[email protected]: 227 / 176

Cam specs
510/540. 112 LSA 211/230 dur at .050.
What kind of spring pressure?

Not the best flowing numbers but with a little clean up of the ports maybe alittle better. But with the lift of the 454ho cam I should be right in the max flow of the heads. I am going to measure the seal to retainer clearance this weekend and see what I got. Any thoughts

I have a set of peanuts on the shelf next to some 781s the thought has crossed my mind to rework them just for the hell of it .gmpp catalog should give ya springs for ho cam .still going to be able to use rotators?you ought to scare up the peanut port build up article by lingenfelter .

i just got some clearance the backyard a$$hole way. bought a set of comp cams 3/8 umbrella seals. they give a few thousandths over stock GM nylon with viton grommet umbrellas. then i took out my trusty belt sander and started shaving them shorter. you only need intake seals. exhaust has no vacuum on them so seals are unnecessary. excess stem clearance will give a puff of smoke on startup only. about 1 minute of sanding to a seal gives me 600 of valve travel before seal hits retainer. i have a 1 inch travel dial indicator and magnetic stand for it. i may also kiss the tops of the intake guides with a dremel for another .025 or so...edit; apparently there is a lot more room on the exhaust side. i have 650 of travel with seals on exhaust. 800 total travel without seals. of course this is 241 L29 heads. but i can't see the guide lengths being much diff. what casting number are your peanuts?

Derek sounds like what I am going to do but I might use a mill vs a belt sander lol. With the trw 2399 pistons they have a 13.8 cc domes and with 540 lift do you think that the valves will hit the pistons. Trying to figure it out befor I buy the cam