Being an Aussie I'm familiar with Yella Terra and their quality and at $572 they seem a pretty good deal when compared fully kitting out the heads with new studs, guide plates, rockers and a girdle. Ed, the heads are angle plug 3991492 castings Ive also just come across a Speedway Motors advert where they have a shaft setup for 454.99 which is well cheap but dont know if they are too cheap. This has lead me to 2 options, the Yella Terra and the Probe Industries items. Re: Yella Terra & Probe Industries Shaft Rockers Thanks for the additional feedback people. It's a 20 year old 350 sbc race motor that was never used with 12.5:1 compression, 660 lift solid roller cam, 9k rev kit, ported gm iron heads, gear drive etc which we plan to spin to 7,500 rpm and run through up to 200 shot of nitrous.Īnyways we are now looking at shaft rocker systems (heads have springs and valves only) and I've been looking at the budget end of things (I'm not considering the Procomp and $200 ebay items). Having the proper valve train geometry is critical to the system being durable and providing the proper valve lift., The tip of the rocker should operate around the centreline of the valve stem when the rocker opens the valve. Racingsnake440 put up a post about titanium pushrods last month and that was for a motor he's picked up for me. 38 Yella Terra CHECKING ROCKER GEOMETRY Rocker arm geometry in relation to the installation is critical. New to here and is my first post other than my intro.
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