won't idle below 1000rpm after rod and jet change

Was a check made to ensure that your intake manifold gaskets were thick enough before installing them.

If you do need to remove the intake, I'd put the intake back on dry move it to one side and measure the remaining gap. If the gap is in the .060-.090 range, a standard .060 gasket will usually seal it up. If you start getting over .100, add .050-.060 to the number and divide by 2 to get a gasket thick enough to provide a good crush. ex. gap is .120, add .060 = .180 /2 = .090. Look for a .090 thick gasket in that case.

I've BTDT with a too thin gasket and it leaked badly.