jeep6981

91 Rs throttle body 95,000 miles she smokes alittle bit on start up and if i let her idle for a while she will smoke im thinking valve seals and valve guides if this is the issue i plan on pulling the heads here is my question how much can i have the mach shop shave off the heads SAFELY i assume i will have to have the intake shaved as well i was thinking about haveing .30 taken off the heads and intake and doing a mild cam any advice would be great thanks

Atilla the Fun

Those heads aren't the ones you want to put any money into. Start by getting the LB9 heads that don't have the highly-restrictive swirl-port intake ports. Your swirl port heads don't respond to porting, and there's no point trying a cam with them. You can shave the heads about 0.030" without having to do anything to the intake manifold. When you get your heads off, confirm that your pistons are at least 0.020" down, "in-the-hole" at top dead center, then order a pair of FelPro steelshim head gaskets. This will get you 9.4:1. Add a GM LT1 cam, and reassemble with Edelbrock's TBI intake. You're ready for a dual-snorkle air cleaner, Holley 570-cfm TB, headers, cat-back, 3.73:1 posi, and lastly, a 2000-stall torque converter. Then you're ready for a 350.

jeep6981

where do i get the LB9 heads i know nothing about those heads are they a factory head from a camaro if so what year can i get them from a junk yard kinda tight budget here

Atilla the Fun

Almost every '87 305, including Caprice should have them, maybe even '87 fullsize halfton pickup 305s. Also used on TPI cars with 5-speed. Your local machine shop may have a pair. Also check the "for sale" section of this website. If you only change one thing, due to budget, best to make it the heads.

jeep6981

if i put heads from an 87 on a 91 block will all of the 91 parts fit on the heads like the factory exhaust and ps pump and atlernater and things of that nature

jeep6981

forgot something the lb9 heads how will i know that when i buy a set they are really lb9 heads any kind of markings on the head thanks again