Posted by 74merc (IP: 207.157.60.21) on September 23, 2000 at 22:09:22:
In Reply to: another challenge, are 86 and 91 blocks different? both are rollers n/m posted by wm on September 21, 2000 at 22:59:29:
the 86 is probably a *little* heavier, the 91 *may* be a little stronger, but functionally, deck height, etc, identical. I've heard of similar power levels sustained on both blocks, I think the differences are nominal.
: : : The 91 HO heads are much more desirable E7TE castings. The '86 heads are one year only. I believe the '86 cchambers are bigger, but I don't know how much. I have heard many times that they are heads to stay away from. -CP
: : :
: : : : Are 1986 5.0 HO heads any different than 91 HO heads. I'm most interested in flow and chamber sizes. Thanks.