do any of you know anything about them they do e-85 conversions using your existing metering blocks and the price is about half what it is to replace them with billet ones.

Ill give this a bump see if any one has any thoughts on doing a conversion this way

Well I haven't had one done but if I did. I would use Mark Sullens aka DragChevette on the E85 forum. http://e85forum.com/index.php?sid=04abf33c1a1ef26aba22074d610e04ab Member Von has used one of his carbs. Perhaps he will see this and chime in. Jim

Chris in Sulk Center Min. did a 850 pro form for me. I ran it this year and it works great. He knows e-85 carbs.

Ask for details on what will be machined, and what parts will be replaced. You can machine the gas metering blocks to something usable, but ask if they enlarge the main well, modify idle fuel restriction, power valve channel restriction enlargement, etc. For optimization, you really should have the boosters changed, and the holes in the metering blocks feeding the boosters enlarged. IMO, the QF metering blocks are a good price because they are resized vs stock and are anodized to fight corrosion. If you machine the existing ones, you have bare aluminum exposed. The QF blocks also have screw in emulsion bleed holes (many to select) for tuning.

Does your carb already have screw in air bleeds? Because the air bleeds will need to be changed. Larger needle and seats too.

Jim is correct Mark Sullens converted my 950HP. Runs like a top, I only needed 1 jet change and 1 air bleed change to get it spot on!! Great customer service. I bet he called me a dozen or more times in the 2 weeks after I got the carb back from him.

If I were looking to go to E85 Id either use Mark or Heath Daniels. Both guys seem to be spot on with their advice and have great customer service.