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Like the title says, I am looking at a set (I use that term loosely) heads and 1 is a 781 and 1 is a 049 head. Both have had a valve job with 2.19/ 1.88 valves which are stainless, etc.
Would this be a problem? Are these heads close enough to work together like this? They seller says both were worked on together so.......what are your thoughts:confused:
My research says the only difference is port volume. 256/114 for the 336781 and 255/119 for the 353049. Not far enough apart to be a problem in my neck of the woods, although Pat McCarthy may have a different take on it. I'd say run 'em. :)
Thanks, that's what I was thinking too. These will be run on a 26' boat with a 454 motor. I just want a little more breath than the peanuts offer that are on her now. I figured the heads would be close enough but wanted some expert opinions...
well???????? no one will know when there bolted down :3dSMILE: i would not do it. not they would not work. but it would get around town and i would not get any more work but?? it could work. they would have to be cheap .the engine will not know:D and if you do it i will never say any thing :D :3dSMILE: you could get them CC and match cut the heads if you wanted on not
Thanks Pat. These are just going in my boat, and I'm not worried about 100% performance, just want the reliability because it sucks getting towed off the ocean LOL. I've been looking for heads now for some time for my boat, and these are pretty close to my house so I wouldn't need to pay shipping. If I can get them cheap I'll pick them up. As far as machine work, the seller says:
STAINLESS VALVES, INTAKE 2.190 EXHAUST 1.880, GUIDE PLATES
SCREW IN STUDS PORTED POLISHED, BOWL AREA CLEANED UP UNDER VALVES, READY TO BOLT ON AND RUN, CASTING # ARE 386781 AND 353049
Oh, what would be a good price for these heads since the seller says they are ready to bolt on (we'll see) and have the bigger stainless valves? My plan would be to buy them, install them as is and run them this summer. Then come winter time depending on how she ran in the summer, either swap cam and do some head work, or maybe take the plunge and do the whole 496 thing.....
i asked this same question a few months ago and got no reply,so i used them anyway and have had no problems at all. i asked a few guys at the track about it and they said there wouldnt be enough difference to bat an eye at. i say run them and enjoy it.
if you two got together you cold each have a matching set