Review on COMP Cams 3100 High-Performance Roller Timing Set for '78-'86 Chevy V6 and 265-400 Small Block by Tim Roby

I originally purchased a #2100 timing chain kit but the chain in the kit was too tight. The chain also seemed cheap so I ended up returning it and buying this #3100. Both instructions in the kits never included a spacer block (for #2100 chain only. for #3100 chain and cam sprocket). The chain in this #3100 is wider and shines much better than the "USA" chain. And it's a real roller chain with no seams on rollers like #2100. And it's pre-stretched. Perfect match in an engine I've been working on. Cam sprocket says "GM"