Thanks Rooster, I'll check the gen 5 tomorrow.

How's the block clearancing going?

Checked the gen 5 cover and it is .5" at the high points which are stamped inward so I don't think clearancing them is an option if it doesn't fit.

I just used same roll masters on 2 gen 6 454s and a gen 6 502, sanded the ribs in timing covers, they rubbed slightly just turning them over by hand, sanded high spot on all the blocks w air sander too, no big deal other than you want to do it if possible before motors ckeaned snd assembled. All 3 of mine had .010 clearance between pins on chain and block before clearancing but if chain ever flopped at sll or w as lked around it would possibly rub, Smitty

I also found when i tore the gen6 502 down it had the mentioned cloyes hd single roller and it had a ton of stretch after 60 hours retarding the cam, id avoid THAT chain!

I had cloyes chains i installed in 2012. By 2016, around maybe 100 hours if that, and they were stretched out like a cheerleader on prom night. Replaced with rollmasters that come with the german made iwis chains. I think the howards ones crude intentions mentioned also come with the german made chain.

personally, i wont run a cast gear chain setup with anything over 400lbs of spring pressure.

lmao.......

What happens when you put a machinist straightedge across the cam and crank gear ?

Many years ago I saw one that was out 10-15 thou and had to have the cam sprocket machined so it fit better. The cam gear also had some broken tips on the sprockets.

Regarding the single roller chains. I've also see a few of the single rollers not only stretch but I've see a few of the single rollers actually broken off and in the oil pan.

I use Rollmaster and clearance as necessary.