stevev wrote:should I start right out with one of the better Canfields, Brodix, etc. and e-bay these things?
Thanks in advance for help.
awesomebill wrote:These particualr heads even though they are very large on the intake runner work pretty good as long as you don't over intake it. The fact you are using injection will help out a lot with the volume in the runner. I run a set of these on a 468 12-1 not so good engine and run 8.04's in my daughters dragster 6 years ago at 1820 lbs. It did not hurt the engine 1 bit from the old school Gm aluminum heads that were produced for the ZL1. Now with your stroke and bore size, you should easlily achieve what you want here and should run faster than your expectations. We only turned the 468 7500 rpm in the traps with a 410 gear and 33" tall tire. It was a fairly loose converter. ps, do not remove the vane in the port, I know of a customer that did and the 60 ft fell off as well as the e.t. by .08. To large of exhaust runner really hurts with this package.
maxracesoftware wrote:there are 2 versions of #861's ....the old ones weren't all that great
as for as material, casting quality, guide's material=steel,
Port Shape + Short Turn shape
the replacement #861's are Edelbrock castings in GM box
much higher quality castings, better seat inserts, bronze guides,
I was guessing he has the older ones since he mentioned the vane in
the exhust port..