Heads

[Chachi]

sounds good thanks

[88grandmarq]

[mrltd]

Combustion chamber design and ports. The E7 (HO) heads don't have shrouded valves like the E6's. The E6 has a heart shaped combustion chamber, which shrouds the valves.(supposedly creates a swirl effect for better combustion) I think the port size is a bit smaller also on the E6's.

[Lincolnmania]

87-95 5.0 ho's and 87-97 ford truck 5.0/5.8's have e7 heads
the e6 head was used on the 86 and some 87 (mark 7 lsc) 5.0 ho's, but those shortblocks have flat top pistons with no dish or valve reliefs
was used on the 86-91 5.0 lopo with dished pistons

[Chachi]

what is the diffrence between HO heads, and non HO heads