anyone swapped 6cy to 8cy and regret it?

[shifty]

Originally Posted by davidh

so, am I guess 15mpg out of bean and thatoneblue67?

I was lucky to get 10-12mpg on the highway or in town (not much difference) with my 250.

All I can say is this: These motors are torquey as hell. If you're pulling stuff, towing or doing heavy hauling, it's a great engine. If you want gas mileage, you're not going to find it here and with a properly tuned SBC, I would reckon you'd get 3-4mpg more and for the price of less than $1k for a crate motor, it's a good deal.

I'll also add this: I was running with a 3spd on the column, and I reckon if I had a 4spd on the floor or a 5spd with my 3.73 gears, I probably would have been a little more efficient on the mpg. If I were to do an inline 6 again, I'd install an automatic tranny and I could probably have been happy as hell with that. Just my 2¢ ☺

EDIT: I saved my original inline and sold two other ones recently. I hate to see them go out to scrap. They are expensive as hell to rebuild, and most people want a newer engine, and when you see it's gonna cost $1500 to rebuild properly, it's wiser to buy a SBC in a crate. It is also 100,000 times easier to find parts (quality parts, that fit) for an SBC versus an inline. Finding custom headers for my 250 was a NIGHTMARE, then I had to take a ballpeen to them to get them to fit, then they hung too low! Pics of the fitmet and everything are here: http://satellitehead.com/gallery/thumbnails.php?album=8

That's a common issue! Be prepared to deal with it if you keep your inline! Aftermarket performance parts for inlines are 2-3 times more expensive as well. Start talking about customized/ported+polished heads (lump port mod, etc.), you're talking about $2-3k right there. Sucks!

All this has led me to put a newer LS1 into my truck. Swap is stalled right now, but lots of progress has been made. Pics are here: http://satellitehead.com/gallery/index.php?cat=3